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General Chemistry
0112001 A 12 11002 51 0317 165509 0041
There are only four fundamental types of force in the universe.
9...
0130010 B 12 11026 31 148604581178 0040
5 2-
The SO ion is called a sulfate ion.
4 3
9 A. True B. False
0130011 B 12 11028...
Nearly all countries, including England and excepting America,
have already adopted or are now adopting a metric system as...
Consider two compounds, A and B, of equal mass and at the
same temperature, to each of which is added equal amounts of
hea...
0178002 A 12 11106 32 01690438018609 0009
Generally, when a solid melts to form a liquid, the density
decreases.
9 A. True...
If a 4 cc block has a density of 3 g/cc, then its mass is
1.33 g.
A. True
9 B. False
0178014 B 12 11130 32 01860195 09
A 6...
0178024 B 12 11150 32 01860195 09
If a 3 cc block has density of 2 g, then its density is 6
g/cc.
A. True
9 B. False
01780...
0190010 B 12 11174 31 0498 0003
When a liquid is at its boiling point, all the molecules have the
same kinetic energy.
9 A...
When a supercooled liquid freezes, some of the potential energy
of the particles is converted into kinetic energy.
9 A. Tr...
9 A. True B. False
0192002 B 12 11230 32 01691149016109 0009
For all solids and liquids, vapor pressure increases linearly...
0192014 A 12 11258 31 11490161 0003
The vapor pressure of a liquid increases as the temperature is
raised.
9 A. True B. Fa...
The atoms of the sun's atmosphere absorb all of the light of certain
1 definite frequencies.
MACRO SUB-ITEM # 2
The relati...
4 of the molecules increases.
MACRO SUB-ITEM # 5
When molecular collisions are more frequent but the speeds are
5 unchange...
0192207 A 12 11345 51 03750706077109 0043
The activity of an ideal gas is always numerically equal to its
partial pressure...
9 A. True B. False
0192220 A 12 11373 31 0710 0003
The vapor pressure of water is essentially independent of the
total pre...
At standard temperature and pressure, how would the volume
occupied by one mole each of diatomic nitrogen and monatomic
ne...
the same speed.
9 A. True B. False
0192408 A 12 11436 31 14860791043809 0040
Evaporation of a liquid is a physical process...
0192602 A 12 11461 31 06651678027409 0041
The phenomenon of interference makes possible the use of x-ray in
crystal analys...
9 B. False
0192616 A 12 11485 31 0715 09
The unit cell is the smallest section of a crystal which
describes the structure ...
9 B. False
0192627 B 12 11507 31 0728 09
The crystal coordination number is the number of ions in a
crystal.
A. True
9 B. ...
9 A. True B. False
0193004 B 12 11531 31 14860293035109 0040
The limit of chemical subdivision is a molecule.
9 A. True B....
9 B. False
0193209 B 12 11558 32 0168 09
The properties of a heterogeneous mixture are uniform
throughout any single sampl...
0193610 B 12 11580 32 0037 09
A compound is any material with two or more elements in it.
A. True
9 B. False
0193611 A 12 ...
All of the following may be reasons why the actual product yield
in a reaction is usually less than 100%: separation and
p...
9 B. False
0196205 B 12 11633 32 02640470 09
Nuclear explosions which directly convert matter into energy
are examples of ...
0196402 B 12 11657 31 14860513026509 0040
The law of definite composition is an exception to the atomic
theory.
9 A. True ...
1 the electrostatic force attracting it by the nucleus.
MACRO SUB-ITEM # 2
The atom for the most part is made up of a nucl...
9 A. True B. False
0210011 A 12 11708 32 15711285035809 0009
The extent of deflection in an electrostatic field is greater...
0211006 B 12 11734 31 02630341 09
In relation to the electron, the neutron is many times
heavier and of opposite charge.
A...
0213004 B 12 11758 32 00970341 09
The number of protons in an atom is always equal to the
number of neutrons.
A. True
9 B....
9 A. True B. False
0221001 B 12 11783 51 03640606154009 0041
Einstein discovered that the line spectrum of an element
cont...
0221012 A 12 11808 32 0189 09
Two isotopes of the same element differ in the number of
neutrons their atoms contain.
A. Tr...
0230006 A 12 11831 32 1313 09
All atomic weights are based ultimately on carbon-12 having
a weight of exactly 12.0000.
A. ...
9 A. True B. False
0231005 A 12 11856 31 03371486035309 0040
Isotopes of an element have the same atomic number.
9 A. True...
3 _______
their abundances are very close to being equal.
9 A. True B. False
0233003 B 12 11885 31 03531486041509 0040
All...
9 A. True B. False
0251004 A 12 11909 31 14860338035409 0040
The electronic configuration of argon (Ar) is
5 2 2 6 2 6
1s ...
A. True
9 B. False
0251015 A 12 11932 32 01891178 09
A negative ion of a certain element can be formed by
addition of an e...
A. only in a vacuum tube
B. in discrete amounts
9 C. as required by its environment.
0270005 A 13 11962 31 06120628 0026
A...
Each electron in an atom revolves in an orbit around the nucleus,
according to present-day theory.
9 A. True B. False
0277...
2Relatively slow neutron bullets can split U-235 into lighter
2atoms and give several neutrons to split other U-235 atoms
...
4 busters.
MACRO SUB-ITEM # 5
The hydrogen bomb is the most potent
5 weapon of war that science will ever produce.
MACRO S...
Nuclear fusion is now used to produce electicity.
9 A. True B. False
0290008 B 12 12079 31 0353 09 0040
Radioactive isotop...
As atomic number increases, the neutron-proton ratio decreases
for stable nuclei.
9 A. True B. False
0291012 A 12 12106 31...
U is the only known fissionable material.
9 A. True B. False
0295002 A 12 12131 31 06611218015909 0041
The nuclear reactio...
Emission of a positron is equivalent to the conversion of a
proton to a neutron in the nucleus.
9 A. True B. False
0295014...
reactant than fusion reactions.
9 A. True B. False
0299004 B 12 12184 32 03641368051809 0009
5 2
According to the einstein...
right area of the periodic table.
A. True
9 B. False
0321001 A 12 12211 31 01890463800409 04 2WVW
Elements with similar ch...
0323106 B 12 12234 31 01890845007509 0043
Except for boron the elements of group III form amphoteric
hydroxides.
9 A. True...
As a class, the melting points of the alkali metals are --------
most other metals.
9 A. higher than B. lower than C. comp...
0323305 A 12 12285 51 01860614001509 0043
The densities of all of the platinum metals are greater than
5 3
that of lead (1...
B. methane E. 1,2-dichloroethane
9 C. trans-2-butene
0331003 C 13 12315 71 8003 06 2WVW
Which will be most easily hydrogen...
The valence electrons of an atom are readily lost.
9 A. True B. False
0337002 A 12 12341 31 00640020 09 0041
The inert gas...
9 A. True B. False
0414002 B 12 12366 31 12540293019609 0009
The molecular formula for hydrogen peroxide, H O , indicates ...
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  1. 1. General Chemistry 0112001 A 12 11002 51 0317 165509 0041 There are only four fundamental types of force in the universe. 9 A. True B. False 0112002 B 12 11004 51 18251826182709 0043 Converting a common logarithm (base 10) to a natural logarithm (base e) can be accomplished by multiplying by 2.303. 9 A. True B. False 0120001 A 12 11006 31 15250787007209 0041 Haber developed a process for synthesizing ammonia. 9 A. True B. False 0120002 B 12 11008 31 14860606018909 0040 More elements were discovered before 1800 than after. 9 A. True B. False 0120003 B 12 11010 31 14860189060609 0040 The last of the elements known today was discovered prior to 1940. 9 A. True B. False 0130001 B 12 11012 31 01960066000409 0041 Hydrogen compounds are known as halogens. 9 A. True B. False 0130002 B 12 11013 51 14610701022409 0043 Titanyl sulfate is Ti SO . 4 2 4 9 A. True B. False 0130003 B 12 11015 31 02241323 09 0043 It is incorrect to write P O for the formula for phosphoric 4 2 5 oxide. 9 A. True B. False 0130004 A 12 11017 31 08460066003509 0043 A hydride is a compound containing hydrogen in the -1 oxidation state. 9 A. True B. false. 0130005 A 12 11019 31 08461296117809 0043 Some hydrides do not contain the hydride ion. 9 A. True B. false. 0130006 B 12 11020 31 08130066019609 0043 An anhydrous compound is one which contains no hydrogen. 9 A. True B. false. 0130007 A 12 11022 31 00770804002809 0043 Acidic anhydrides are oxides of nonmetals. 9 A. True B. false. 0130008 B 12 11023 31 14861461018909 0040 All of the elements are named following a set pattern. 9 A. True B. False 0130009 B 12 11025 31 14861461001809 0040 Na S is named sodium sulfate. 4 2 9 A. True B. False
  2. 2. 0130010 B 12 11026 31 148604581178 0040 5 2- The SO ion is called a sulfate ion. 4 3 9 A. True B. False 0130011 B 12 11028 31 054818390730 0043 5 3+ A gaseous ferric ion (Fe ; Z = 26) and a gaseous chromium atom (Z=24) are isoelectronic. 9 A. True B. False 0160002 AACBABB 73 11030 52 049980010195149006 ETS2 OS MACROITEM STEM 2The following questions refer to the kinetic-molecular theory. 2After each item number on the answer sheet, blacken space 2 A. if the item refers to observational or experimental 2 evidence which supports the theory 2 B. if the item refers to an hypothesis or an assumption 2 concerning the theory which was formulated long 2 before there was experimental evidence to test it, 2 or has not as yet been entirely proven to be true 2 experimentally 2 C. if the item refers to something which has nothing to do 0 with the theory MACRO SUB-ITEM # 1 The volume of a gas increases with an increase in temperature when 1 the pressure remains constant. MACRO SUB-ITEM # 2 2 A gas always exerts pressure no matter how much it expands. MACRO SUB-ITEM # 3 3 Most gases are colorless. MACRO SUB-ITEM # 4 Gases are composed of small particles called molecules which are 4 relatively far apart and in rapid motion. MACRO SUB-ITEM # 5 5 Gases diffuse readily. MACRO SUB-ITEM # 6 6 Molecules are perfectly elastic. MACRO SUB-ITEM # 7 9 Molecules on colliding lose no energy. 0170001 A 13 11043 31 80018002 11 06 ETS2 OS Potential energy is A. energy of position B. energy of motion 9 C. heat energy 0170002 B 12 11045 31 149504710149 0009 Appropriate conversion factors would allow you to convert from a volume measurement in cubic feet to a density measurement in grams per cubic centimeter. 9 A. True B. False 0170003 B 12 11048 32 14860795 09 0040 The carat unit of weight is larger than a gram. 9 A. True B. False 0170004 B 12 11050 31 14860445015009 0040 A 1000-carat diamond weighs more than one kg. 9 A. True B. False 0172001 A 12 11051 31 01500149 09 0009
  3. 3. Nearly all countries, including England and excepting America, have already adopted or are now adopting a metric system as the single recognized system of measurement. 9 A. True B. False 0172002 A 12 11054 31 01500385149409 0009 The simplification in using the metric system is that, when converting units within the system, a decimal point is moved. 9 A. True B. False 0172003 B 12 11056 31 14861316079509 0040 AMU are the same as grams. 9 A. True B. False 0174001 B 13 11057 32 01611403 0019 Which of the following represents the highest temperature? 5 o o o o 9 A. 40 F B. 40 C C. 304 K D. 492 R 0176001 A 12 11060 32 0207 09 The specific heat of a substance is expressed in calories per gram per degree centigrade. A. True 9 B. False 0176002 B 12 11062 32 0207 09 The specific heat is the number of calories required to raise the temperature of any sample of a specific compound to a specific final temperature. A. True 9 B. False 0176003 B 12 11065 32 0207 09 The specific heat of a compound changes as the mass of compound changes. A. True 9 B. False 0176004 B 12 11067 32 02070206 09 Two equal masses of different compounds at the same temperature can have the same heat content only if their specific heats are different. A. True 9 B. False 0176005 B 13 11070 32 0207 05 The specific heat of a compound is A. the amount of heat required to melt 1 g of the compound. B. The quantity of heat required to raise the temperature of 1 g one degree C. C. the quantity of heat required to increase the 9 temperature one degree C. 0176006 A 12 11074 52 02070648 09 Consider two compounds, A and B, of equal mass and at the same temperature, to each of which is added equal amounts of heat. If the specific heat of B is larger than the specific heat of A, then the final temperature of a will be higher than the final temperature of B. A. True 9 B. False 0176007 B 12 11078 52 02070648 09
  4. 4. Consider two compounds, A and B, of equal mass and at the same temperature, to each of which is added equal amounts of heat. If the specific heat of B is larger than the specific heat of A, then the final temperature of B will be higher than the final temperature of A. A. True 9 B. False 0176008 B 12 11082 52 02070648 09 Consider two compounds, A and B, of equal mass and at the same temperature, to each of which is added equal amounts of heat. If the final temperature of B is higher than the final temperature of A, then the specific heat of B is greater than the specific heat of A. A. True 9 B. False 0176009 A 12 11086 52 02070648 09 Consider two compounds, a and b, of equal mass and at the same temperature, to each of which is added equal amounts of heat. If the final temperature of b is higher than the final temperature of a, then the specific heat of b is smaller than the specific heat of A. A. True 9 B. False 0177001 C 13 11090 31 062203290054 0026 Violet light and red light differ in their 9 A. speed B. nature C. frequency. 0177002 A 13 11092 31 061506641340 0026 White light can be separated into its constituent wavelengths by means of a 9 A. prism B. mirror C. vacuum. 0177003 A 13 11094 31 039206161340 0026 Of the types listed below, the electromagnetic radiation with the greatest frequency is 9 A. x-rays B. visible light C. microwaves. 0177004 C 13 11096 31 033701890616 0026 The atomic number of an element can be determined directly from its 9 A. color B. density C. x-ray spectrum. 0177005 C 15 11098 32 01591340061609 0009 Consider the following regions of the electromagnetic spectrum: 1. x-ray 2. ultraviolet 3. visible 4. infrared The energy associated with individual quanta of these regions increases in the order 9 A. 1,2,3,4 B. 3,4,2,1 C. 4,3,2,1 D. 3,1,4,2 E. 1,4,3,2 0177006 B 12 11102 31 0615 09 Wavelength is defined as the distance between a crest and the succeeding trough of a wave. A. True 9 B. False 0178001 A 12 11104 31 80030161018609 04 2WVW Air has a density of 1.29 grams per liter at standard temperature and pressure. A. True 9 B. False
  5. 5. 0178002 A 12 11106 32 01690438018609 0009 Generally, when a solid melts to form a liquid, the density decreases. 9 A. True B. False 0178003 A 12 11108 32 01860195 09 If a cube with a density of 4 g/cc has a mass of 5 g, then its volume is 1.25 cc. A. True 9 B. False 0178004 A 12 11110 32 01860195 09 A crystal has a density of 9 g/cc and a mass of 3 g. What is its volume? 9 A. 0.33 cc's B. 3.0 cc's C. 27./ cc's 0178005 A 12 11112 32 01860195 09 If a 5 g cube has a density of 2 g/cc, then its volume is 2.5 cc's. A. True 9 B. False 0178006 B 12 11114 32 01860195 09 If a 5 g sphere has a density of 2 g/cc, then its volume is 0.4 cc's. A. True 9 B. False 0178007 B 12 11116 32 01860195 09 If a 2 g block has a density of 5 g/cc, then its volume is 10 cc's. A. True 9 B. False 0178008 B 12 11118 32 01860195 09 If a cube has a density of 5 g/cc and a mass of 4 g, then its volume is 1.25 cc's. A. True 9 B. False 0178009 A 12 11120 32 01860195 09 If a cube has a density of 6 g/cc and a mass of 8 g, then its volume is 1.33 cc's. A. True 9 B. False 0178010 B 12 11122 32 01860195 09 A piece of manganese has a density of 7.0 g/cc and a mass of 3.5 grams. It therefore will have a volume of 2.0 cc's. A. True 9 B. False 0178011 A 12 11124 32 01860195 09 If a 4 cc block has a density of 3 g/cc, then its mass is 12 g. A. True 9 B. False 0178012 B 12 11126 32 01860195 09 If a 3 cc block has a density of 3 g/cc, then its mass is 1 g. A. True 9 B. False 0178013 B 12 11128 32 01860195 09
  6. 6. If a 4 cc block has a density of 3 g/cc, then its mass is 1.33 g. A. True 9 B. False 0178014 B 12 11130 32 01860195 09 A 6 cc block with a density of 20 g/cc would have a mass of 1.2 g. A. True 9 B. False 0178015 A 12 11132 32 01860195 09 An 8 cc block with a density of 2 g/cc would have a mass of 16 g. A. True 9 B. False 0178016 B 12 11134 32 01860195 09 A 4 cc block with a density of 2 g/cc would have a mass of 2 g. A. True 9 B. False 0178017 B 12 11136 32 01860195 09 If a cube with a density of 3.0 g/cc has a volume of 6 cc's, then its mass is 0.5 g. A. True 9 B. False 0178018 B 12 11138 32 01860195 09 If a cube with a density of 6.0 g/cc has a volume of 3 cc's, then its mass is 2 g. A. True 9 B. False 0178019 B 12 11140 32 01860195 09 If a cube with a density of 6.0 g/cc has a volume of 3 cc's, then its mass is 2 g. A. True 9 B. False 0178020 A 12 11142 32 01860195 09 If a 4 g cube is 2.0 cc's in volume, then its density is 2.0 g/cc. A. True 9 B. False 0178021 B 12 11144 32 01860195 09 If a 12 g cube is 4.0 cc's in volume, then its density is 48.0 g/cc. A. True 9 B. False 0178022 B 12 11146 32 01860195 09 If a 3 cc block has a mass of 3 g, then its density is 3 g/cc. A. True 9 B. False 0178023 A 12 11148 32 01860195 09 If a 5 cc block has a mass of 10 g , then its density is 2 g/cc. A. True 9 B. False
  7. 7. 0178024 B 12 11150 32 01860195 09 If a 3 cc block has density of 2 g, then its density is 6 g/cc. A. True 9 B. False 0178025 A 12 11152 32 01860195 09 If a 2 cc block has a mass of 5 g, then its density is 2.5 g/cc. A. True 9 B. False 0178026 B 12 11154 32 01860195 09 If a 1.5 cc block has a mass of 4 g, then its density is 6 g/cc. A. True 9 B. False 0190001 A 12 11156 31 00398003 09 2WVW Gold may be found uncombined in nature A. True 9 B. False 0190002 A 12 11157 31 0027023680039004 2WVW Zinc sulfide is a white precipitate A. True 9 B. False 0190003 B 12 11158 31 14931468019209 0009 Extensive properties characterize, chemically identify, a substance. 9 A. True B. False 0190004 A 12 11160 51 14680037018609 0009 In trying to identify a certain liquid compound "L", a student finds that its density, freezing and boiling points, absorption spectrum, and behavior in a chromatography column are indistinguishable from those of known compound "Z". The student can safely assume L and Z are one and the same compound. 9 A. True B. False 0190005 B 12 11165 31 14860028018909 0040 About 50% of the known elements are nonmetals. 9 A. True B. False 0190006 A 12 11166 31 1149 0003 Rubbing alcohol feels cooler on the skin than does water because water has a lower vapor pressure. 9 A. True B. False 0190007 A 12 11168 31 01960498 0003 Hydrogen has a very low normal boiling point because its molecules are symmetrical and have few electrons. 9 A. True B. False 0190008 A 12 11170 31 01950114 0003 The molar volume of a liquid changes very little with changing pressure. 9 A. True B. False 0190009 B 12 11172 31 0008 0003 Water in an open thermos bottle will usually be colder than water in an open drinking glass. 9 A. True B. False
  8. 8. 0190010 B 12 11174 31 0498 0003 When a liquid is at its boiling point, all the molecules have the same kinetic energy. 9 A. True B. False 0190011 A 12 11176 51 1701 0003 Amorphous materials ordinary become less viscous as they are heated. 9 A. True B. False 0190012 A 12 11178 31 1701 0003 Amorphous materials cannot cleave to reveal crystal faces. 9 A. True B. False 0190013 B 12 11180 31 01281149 0003 A substance with a high molecular weight will always have a lower vapor pressure than will one with a lower molecular weight, at any given temperature. 9 A. True B. False 0190014 A 12 11183 31 0498 0003 The normal boiling point of a liquid can be changed by changing the pressure. 9 A. True B. False 0190015 A 12 11185 31 0183 0003 5 + A ferric oxide (Fe O ) sol may be coagulated by adding H . 4 2 3 9 A. True B. False 0190016 A 12 11188 31 0485 0003 A catalyst alters the rate of a reaction without taking part in it 9 A. True B. False 0190017 A 12 11190 31 0494 0003 The frequency of collision between reacting particles is increased by increasing the temperature. 9 A. True B. False 0190019 A 12 11192 31 1548 0003 Relaxation spectroscopy is used to study reactions in which the rate of mixing of reactants is ordinarily much faster than their rate of chemical combination. 9 A. True B. False 0190020 B 12 11195 31 0490 0003 The triple-point temperature of water is slightly less than tne normal freezing point. 9 A. True B. False 0190021 A 12 11197 31 0555 0003 Whenever a pure liquid freezes, the temperature remains constant. 9 A. True B. False 0190022 A 12 11199 31 0558 0003 The lines on a phase diagram represent equilibrium between two phases. 9 A. True B. False 0190023 A 12 11201 31 04090438 0003
  9. 9. When a supercooled liquid freezes, some of the potential energy of the particles is converted into kinetic energy. 9 A. True B. False 0190024 A 12 11203 31 1152 0003 Spontaneous freezing of water at -10 degrees C and constant pressure is accompanied by a decrease in free energy, if the ice formed is kept at -10 degrees C. 9 A. True B. False 0190025 B 12 11206 31 0490 0003 If heat is continuously added to solid, liquid, and gaseous water, all in equilibrium at the triple point, the solid and liquid phases will disappear simultaneously if the pressure is kept constant. 9 A. True B. False 0190026 B 12 11209 31 0490 0003 If the pressure of a sample of carbon dioxide at the triple point is increased, the phase remaining will be solid if the temperature is held constant. 9 A. True B. False 0190027 A 12 11212 31 0511 0003 If heat is added to ice at -1 degrees C, the average kinetic energy of the molecules will always increase. 9 A. True B. False 0190028 B 12 11214 31 0245 0003 The temperature at which a liquid and a gas are at equilibrium is always the same if the pressure is the same. 9 A. True B. False 0190029 A 12 11216 31 0409 0003 Supercooled water may be frozen by adding a snowflake. 9 A. True B. False 0190030 A 12 11218 31 0245 0003 If a liquid and its vapor are at equilibrium and the pressure is increased, heat is evolved. 9 A. True B. False 0190031 A 12 11220 31 0491 0003 The rates of most reactions change as the reactions proceed, even if the temperature is held constant. 9 A. True B. False 0190032 A 12 11222 31 0114 0003 Increasing the total pressure in a gas phase reaction increases the fraction of the collisions which are effective in producing reaction. 9 A. True B. False 0190033 A 12 11225 31 0407 0003 In stepwise reactions the rate-determining step is the slow one. 9 A. True B. False 0190034 A 12 11227 31 04850996 0003 An enzyme is a biochemical catalyst. 9 A. True B. False 0192001 A 12 11228 31 05041153019209 0009 Changes in physical state, like melting and boiling, tend to resolve matter into pure component substances.
  10. 10. 9 A. True B. False 0192002 B 12 11230 32 01691149016109 0009 For all solids and liquids, vapor pressure increases linearly with temperature. 9 A. True B. False 0192003 B 12 11232 31 0652 0003 The mean free path of molecules in a liquid is greater than that of molecules in a gas. 9 A. True B. False 0192004 A 12 11234 31 0524 0003 The statement "gases are more compressible than liquids" means that it is easier to increase the pressure of a gas than that of a liquid. 9 A. True B. False 0192005 A 12 11237 31 0153 0003 Water in an open container will eventually evaporate. 9 A. True B. False 0192006 A 12 11239 31 11740195 0003 The molar volume of liquid water at 100 degrees C is less than that of gaseous water at the same temperature. 9 A. True B. False 0192007 A 12 11241 31 0423 0003 The molecules in liquid water at 100 degrees C have a lower average potential energy than the molecules in gaseous water at the same temperature. 9 A. True B. False 0192008 B 12 11244 51 11490498 0003 The vapor pressure of chloroform at its normal boiling point is greater than that of water at its normal boiling point. 9 A. True B. False 0192009 A 12 11246 31 14180300 0003 A much smaller fraction of the space occupied by a liquid is "empty" than in the case of a gas. 9 A. True B. False 0192010 B 12 11248 31 1412 0003 It takes more time to hard-boil an egg on a high mountain than at sea level because the atmospheric pressure is lower on the mountain. 9 A. True B. False 0192011 A 12 11251 31 0494 0003 Liquids diffuse much more slowly than gases, because the molecules in a liquid collide less frequently. 9 A. True B. False 0192012 B 12 11253 31 0161 0003 Molecules in a gas move at the same average speed as the molecules in a liquid if the gas and the liquid are at the same temperature. 9 A. True B. False 0192013 A 12 11256 31 04331149 0003 A barometer measures the equilibrium vapor pressure of the air. 9 A. True B. False
  11. 11. 0192014 A 12 11258 31 11490161 0003 The vapor pressure of a liquid increases as the temperature is raised. 9 A. True B. False 0192015 C 13 11260 31 050405881427 Which of the following states of matter is characterized by the most random motion of molecules? 9 A. solid B. liquid C. gas 0192016 A 13 11262 31 050405881359 Which of the following states of matter is characterized by the most highly ordered array of molecules? 9 A. solid B. liquid C. gas 0192017 C 13 11264 31 044205880504 Which state of matter is characterized by the highest intermolecular forces of attraction? 9 A. solid B. liquid C. gas 0192018 A 13 11266 31 050405881427 Which state of matter is characterized by the lowest intermolecular forces of attraction? 9 A. gas B. liquid C. solid 0192019 C 13 11268 31 050405881427 Which state of matter has the longest range intermolecular forces? 9 A. gas B. liquid C. solid 0192020 A 13 11270 31 050405880524 Which state of matter is most easily compressed into a smaller volume? 9 A. gas B. liquid C. solid 0192021 C 13 11272 31 05040588 Which state of matter has the lowest fluidity? 9 A. gas B. liquid C. solid 0192022 B 13 11274 31 050405881418 Which state of matter is characterized by portions of high molecular order which quickly disperse forming new portions of order? 9 A. gas B. liquid C. solid 0192023 A 13 11277 51 08710558 A system consists of two phases and is composed of liquid water and liquid benzene. Which of the following is true? A. Water and benzene do not mix. B. The system is a homogeneous mixture. 9 C. Benzene dissolves in water. 0192201 CCBA 43 11281 52 033003318001169006 ETS2 OS MACROITEM STEM 2After the number on the answer sheet which corresponds to 2that of each conclusion, blacken space 2 A. if the conclusion is the best answer to the problem 2 B. if the conclusion is the least satisfactory answer to the 2 problem 2 C. if the conclusion is neither the best answer nor the least 2 satisfactory answer to the problem. (Two conclusions 0 should receive this mark). MACRO SUB-ITEM # 1 The dark lines of the solar spectrum are due to the fact that
  12. 12. The atoms of the sun's atmosphere absorb all of the light of certain 1 definite frequencies. MACRO SUB-ITEM # 2 The relatively dark lines of the solar spectrum are due to the fact that the atoms of the heated and rarefied gases of the sun's atmosphere both absorb and emit light of certain definite 2 frequencies. MACRO SUB-ITEM # 3 The atmosphere of the sun contains sodium atoms which absorb light of certain definite frequencies and emit light of the same 3 frequencies. MACRO SUB-ITEM # 4 The atoms of the surface of the sun are incandescent and emit light which gives a continuous spectrum, while the atoms of the sun's atmosphere are not incandescent and thus absorb 9 light of certain definite frequencies. 0192202 ACACCAB 73 11296 52 1 028602939019149506 ETS2 OS MACROITEM STEM 2The following questions refer to Figure 19. 2A piston is pushed down in a cylinder of air as shown in the 2diagram. After each item number on the answer sheet, blacken 2space 2 A. if the statement is true and the reason given is true 2 B. if the statement is true, but the reason given is false 0 C. if the statement is itself false MACRO SUB-ITEM # 1 The gas heats up, because the average kinetic energy of the 1 molecule has been increased. MACRO SUB-ITEM # 2 2 The number of molecules is increased, because the gas heats up. MACRO SUB-ITEM # 3 The gas heats up, because energy is expended in pushing down 3 on the piston. MACRO SUB-ITEM # 4 4 The molecules slow down, because they are being pushed together. MACRO SUB-ITEM # 5 The cylinder cools off, because the molecules absorb heat 5 from it. MACRO SUB-ITEM # 6 The pressure increases, because the air molecules collide more 6 frequently with the walls of the cylinder. MACRO SUB-ITEM # 7 The temperature of the gas increases, because the air molecules 9 lose energy as they collide with each other. 0192203 ACCAABCB 83 11308 52 049904720114119006 ETS OS MACROITEM STEM 2To answer the following questions, consider the following 2statements to apply to the kinetic theory of an ideal gas. 2Mark space 2 A. if a statement is true without qualification 2 B. if a statement is false without qualification 2 C. if a statement may be either true or false depending 0 on some further conditions MACRO SUB-ITEM # 1 When a certain gas is made denser, the molecules are then closer 1 together. MACRO SUB-ITEM # 2 2 When a gas is heated it expands. MACRO SUB-ITEM # 3 3 When a gas is heated its pressure rises. MACRO SUB-ITEM # 4 When the temperature of a gas is raised, the average speed
  13. 13. 4 of the molecules increases. MACRO SUB-ITEM # 5 When molecular collisions are more frequent but the speeds are 5 unchanged, the pressure is greater. MACRO SUB-ITEM # 6 When molecular collisions are more frequent but the speeds are 6 unchanged, the temperature is greater. MACRO SUB-ITEM # 7 When the molecules of a gas are crowded closer together, their 7 average speed increases. MACRO SUB-ITEM # 8 When a gas is compressed adiabatically, heat is generated by 9 friction between the molecules. 0192204 C 13 11321 52 0542800103401306 ETS2 OS Two identical leak-proof balloons a and b are filled, a with hydrogen and b with helium, so that at room temperature and pressure their volumes are equal. When they are taken together to the top of a mountain A. 1 will become appreciably bigger than 2 B. 2 will become appreciably bigger than 1 9 C. 1 and 2 will have approximately equal volumes 0192205 AACBABB 73 11326 72 030702788001119006 ETS2 OS MACROITEM STEM 2The following questions refer to the kinetic-molecular 2theory. After each item number on the answer sheet, 2blacken space 2 A. if the item refers to observational or experimental 2 evidence which supports the theory. 2 B. if the item refers to an hypothesis or an assumption 2 concerning the theory which was formulated long 2 before there was experimental evidence to test it, 2 or has not as yet been entirely proven to be true 2 experimentally. 2 C. if the item refers to something which has nothing to 0 do with the theory. MACRO SUB-ITEM # 1 The volume of a gas increases with an increase in temperature 1 when the pressure remains constant. MACRO SUB-ITEM # 2 2 A gas always exerts pressure no matter how much it expands. MACRO SUB-ITEM # 3 3 Most gases are colorless. MACRO SUB-ITEM # 4 Gases are composed of small particles called molecules 4 which are relatively far apart and in rapid motion. MACRO SUB-ITEM # 5 5 Gases diffuse readily. MACRO SUB-ITEM # 6 6 Molecular collisions are perfectly elastic. MACRO SUB-ITEM # 7 9 Molecules on colliding lose no energy. 0192206 C 13 11339 52 0542019680011306 ETS2 OS Two identical balloons 1 and 2 are filled, 1 with hydrogen and 2 with helium, so that at room temperature and pressure their volumes are equal. When they are taken together to the top of a mountain, assuming that there is no leakage of gas from either balloon. A. 1 will become appreciably bigger than 2 B. 2 will become appreciably bigger than 1 9 C. 1 and 2 will have approximately equal volumes
  14. 14. 0192207 A 12 11345 51 03750706077109 0043 The activity of an ideal gas is always numerically equal to its partial pressure. 9 A. True B. false. 0192208 B 12 11347 51 03751404077109 0043 The activity of a real gas is always numerically less than its partial pressure. 9 A. True B. false. 0192209 B 12 11349 32 10970192018609 0009 Two separate samples of the same gaseous substance at the same pressure would have densities in the same ratio as their absolute temperatures. 9 A. True B. False 0192210 B 12 11352 32 01131392016109 0009 The fact that a sample of gas would not have zero volume at the absolute zero of temperature is a consequence of the fact that absolute zero cannot be reached. 9 A. True B. False 0192211 A 12 11355 31 14860511049909 0040 The kinetic energy of an H molecule is lower than that of an O 4 2 2 molecule traveling at the same speed. 9 A. True B. False 0192212 A 12 11358 31 14860511016109 0040 The average kinetic energy of molecules of different gases is the same at a given temperature. 9 A. True B. False 0192213 B 12 11360 31 14860186011309 0040 A high density is a characteristic of gases. 9 A. True B. False 0192214 B 12 11361 31 01130321034809 0009 Of all the gases in the atmosphere, nitrogen is the least reactive. 9 A. True B. False 0192215 A 12 11363 31 07060128 0003 The molecular weight of a gas may be calculated from its density at a given pressure and temperature. 9 A. True B. False 0192216 B 12 11365 31 1429 0003 Gases which have low critical temperatures often show near-ideal behavior. 9 A. True B. False 0192217 B 12 11367 31 1429 0003 Gases which have high critical pressures usually have low critical temperatures. 9 A. True B. False 0192218 A 12 11369 31 0258 0003 The rate of diffusion of a gas is inversely proportional to the square root of its density. 9 A. True B. False 0192219 B 12 11371 31 0706 0003 The perfect-gas law can be used only for 1 mole of gas.
  15. 15. 9 A. True B. False 0192220 A 12 11373 31 0710 0003 The vapor pressure of water is essentially independent of the total pressure. 9 A. True B. False 0192221 A 12 11375 31 0706 0003 The ratio of PV to T is independent of the pressure for a given quantity of ideal gas. 9 A. True B. False 0192222 B 12 11377 31 0706 0003 Equal weights of different gases contain the same number of molecules at STP. 9 A. True B. False 0192223 A 12 11379 31 0511 0003 The most probable kinetic energy of the molecules in a gas increases as the temperature is increased. 9 A. True B. False 0192224 A 12 11381 31 1392 0003 An ideal gas would have no volume at absolute zero. 9 A. True B. False 0192225 B 12 11383 31 0706 0003 At low pressures the molecules of a gas are moving more slowly than at high pressures. 9 A. True B. False 0192226 A 12 11385 31 0706 0003 All gases, except hydrogen and helium, undergo cooling when they are allowed to expand freely at room temperature. 9 A. True B. False 0192227 A 12 11387 31 0511 0003 The molecules in liquid water at 100 degrees C have a lower average kinetic energy than the molecules in gaseous water at the same temperature 9 A. True B. False 0192228 A 12 11390 31 11490128 0003 At 25 degrees C the vapor pressure of chloroform, CHCl , is 4 3 higher than that of carbon tetrachloride, CCl , because CHCl has 4 4 3 a lower molecular weight. 9 A. True B. False 0192229 A 12 11394 31 1429 0003 When a liquid is at the critical temperature, its vapor pressure is the same as the critical pressure. 9 A. True B. False 0192230 B 13 11396 32 06540884 0540 At standard temperature and pressure, how would the volume occupied by one mole each of diatomic chlorine and monatomic xenon compare ? ( atomic numbers Cl = 17 , Xe = 54 ) A. the chlorine volume is greater than that of xenon B. the chlorine volume is equal to that of xenon 9 C. the chlorine volume is less than that of xenon 0192231 C 13 11401 32 06540884 0540
  16. 16. At standard temperature and pressure, how would the volume occupied by one mole each of diatomic nitrogen and monatomic neon compare? (atomic numbers N = 7, Ne = 10) A. the nitrogen volume is less than that of neon B. the nitrogen volume is greater than that of neon 9 C. the nitrogen volume is equal to that of neon 0192232 A 13 11406 32 06540884 0540 At standard temperature and pressure, how would the volume occupied by one mole each of diatomic oxygen and monatomic krypton compare ? ( atomic numbers O = 8 , Kr = 36 ) A. the oxygen volume is equal to that of krypton B. the oxygen volume is greater than that of krypton 9 C. the oxygen volume is less than that of krypton 0192233 B 13 11411 32 06540884 0540 At standard temperature and pressure, how would the volume occupied by one mole each of monatomic helium and monatomic xenon compare ? ( atomic numbers He = 2 , Xe = 54 ) A. the helium volume is greater than that of xenon B. the helium volume is equal to that of xenon 9 C. the helium volume is less than that of xenon 0192234 C 13 11416 32 06540884 0540 At standard temperature and pressure, how would the volume occupied by one mole each of diatomic fluorine and monatomic argon compare ? ( atomic numbers F = 9 , Ar = 18 ) A. the fluorine volume is less than that of argon B. the fluorine volume is greater than that of argon 9 C. the fluorine volume is equal to that of argon 0192401 B 12 11421 32 03930293139409 0041 Gasoline, whose molecules have symmetrical arrangements of positive and negative charge, is an example of a nonpolar liquid. 9 A. True B. False 0192402 A 12 11423 31 04980192012809 0009 Boiling points of molecular substances usually increase with molecular weight. 9 A. True B. False 0192403 A 12 11425 31 0438 0003 In a liquid the attractive forces between the molecules are opposed by the repulsive forces between the electron clouds of neighboring molecules. 9 A. True B. False 0192404 A 12 11428 31 14860174141209 0040 Water will boil at 20 degrees C provided the atmospheric pressure is equal to the vapor pressure of the water. 9 A. True B. False 0192405 B 12 11430 31 14860498011409 0040 The normal boiling point of a liquid varies with atmospheric pressure. 9 A. True B. False 0192406 B 12 11432 31 14860498051109 0040 When a liquid is at its boiling point, all the molecules have the same kinetic energy. 9 A. True B. False 0192407 B 12 11434 31 14860505043809 0040 At a given temperature, all molecules in a liquid are moving at
  17. 17. the same speed. 9 A. True B. False 0192408 A 12 11436 31 14860791043809 0040 Evaporation of a liquid is a physical process. 9 A. True B. False 0192409 B 12 11437 31 01140113024509 0009 The pressure exerted by a sample of gaseous benzene in equilibrium with liquid benzene will depend on the container volume. 9 A. True B. False 0192410 A 12 11440 31 016110400871 0009 Higher temperatures would favor the production of more product in the following system: benzene(l) <=====> benzene(g). 9 A. True B. False 0192411 A 12 11442 31 04980177 0003 An ordinary table top will serve as an effective hot plate for boiling liquid air. 9 A. True B. False 0192412 B 12 11444 31 04980008 0003 The boiling point of water is always 100 degrees C. 9 A. True B. False 0192413 A 12 11446 31 13590438 0003 In a liquid there may be a temporary and localized ordering of neighbors around a molecule. 9 A. True B. False 0192414 AA 22 11448 32 11490498043890 0009 MACROITEM STEM At 50 degrees C, the vapor pressure of liquid A is found to be 50 0 mm Hg; that of liquid B, 125 mm Hg. MACRO SUB-ITEM # 1 One can be reasonably sure that liquid A has the higher normal boiling point. 1 A. True B. False MACRO SUB-ITEM # 2 For these same two liquids, one can state that the liquid with the higher surface tension at 50 degrees C is probably A. 9 A. True B. False 0192415 B 13 11453 51 05240438 The compressibility of liquids is A. very great because the molecules of a liquid slide easily over one another B. very small because molecules of liquid are quite close together 9 C. extremely dependent on intermolecular forces 0192416 A 12 11457 31 0122 0003 Brownian motion is more pronounced for small particles than for large ones. 9 A. True B. False 0192601 A 12 11459 31 02448004001909 04 2WVW The geometric form of crystals is the result of the orderly arrangement of molecules, atoms, and ions. A. True 9 B. False
  18. 18. 0192602 A 12 11461 31 06651678027409 0041 The phenomenon of interference makes possible the use of x-ray in crystal analysis. 9 A. True B. False 0192603 B 12 11463 31 05891213024409 0041 Diamond is an example of an ionic crystal. 9 A. True B. False 0192604 A 12 11464 31 02370244029309 0041 Covalent crystals consist of arrays of separate molecules. 9 A. True B. False 0192605 A 12 11466 31 01691161 09 0009 Are all solids crystalline? 9 A. Yes B. No 0192606 B 12 11467 31 14860169015309 0040 Some solids may evaporate. 9 A. True B. False 0192607 A 12 11468 31 0173 0003 Metallic solids have hardnesses which vary markedly from one metal to another. 9 A. True B. False 0192608 A 12 11470 31 0169 0003 X-ray diffraction shows that solids generally have a very ordered structure. 9 A. True B. False 0192609 A 12 11472 31 06160612 0003 An x-ray diffraction photograph is a picture of the inside of a crystal. 9 A. True B. False 0192610 A 12 11474 31 0169 0003 Lattice defects are quite common. 9 A. True B. False 0192611 A 12 11475 31 15931932 09 An isomorphous substance also can be crystalline. A. True 9 B. False 0192612 A 12 11477 31 15931933 09 A polymorphous substance also can be crystalline. A. True 9 B. False 0192613 B 12 11479 31 1701 09 Substances which are crystalline also can be amorphous. A. True 9 B. False 0192614 A 12 11481 31 15931933 09 Substances which are crystalline also can be polymorphous. A. True 9 B. False 0192615 B 12 11483 31 0715 09 The unit cell is that section of a crystal which contains one formula weight of the compound A. True
  19. 19. 9 B. False 0192616 A 12 11485 31 0715 09 The unit cell is the smallest section of a crystal which describes the structure of the crystal. A. True 9 B. False 0192617 B 12 11487 51 0715 09 The smallest section of a crystal which describes the structure of the whole crystal is called the formula unit. A. True 9 B. False 0192618 A 12 11489 51 0715 09 In a crystal, the smallest repetitive unit which has the full symmetry of the lattice is defined as the unit cell. A. True 9 B. False 0192619 B 12 11491 31 1701 09 Amorphous solids have a regular arrangement of atoms in space. A. True 9 B. False 0192620 B 12 11493 51 01790172 09 A pure crystalline solid characteristically melts over a wide temperature range. A. True 9 B. False 0192621 A 12 11495 31 01790172 09 Crystalline solids have a sharp melting point. A. True 9 B. False 0192622 B 12 11497 31 17010172 09 Amorphous solids melt at a sharply defined temperature. A. True 9 B. False 0192623 A 12 11499 31 1701 09 Amorphous solids have little or no regular arrangement of their constituent atoms. A. True 9 B. False 0192624 A 12 11501 31 0179 09 Crystalline solids have a regular arrangement of atoms in space. A. True 9 B. False 0192625 B 12 11503 32 1892 09 In a cubic closest-packed structure, the particles of the substance are of different size in alternate layers. A. True 9 B. False 0192626 B 12 11505 32 1892 09 In a cubic closest-packed structure, the particles of the substance are spheres of unequal size. A. True
  20. 20. 9 B. False 0192627 B 12 11507 31 0728 09 The crystal coordination number is the number of ions in a crystal. A. True 9 B. False 0192628 B 12 11509 31 0728 09 The crystal coordination number is the number of ions in a unit cell. A. True 9 B. False 0192629 A 12 11511 31 0728 09 The crystal coordination number is the number of nearest neighbors to an ion in a crystal. A. True 9 B. False 0192630 B 12 11513 31 08230825 09 The radius ratio of ions in a crystal is the ratio of the number of positive ions to negative ions in the unit cell. A. True 9 B. False 0192631 A 12 11515 31 08230325 09 The radius ratio of ions in a crystal is the ratio of the radius of the positive ion to the radius of the negative ion. A. True 9 B. False 0192632 A 12 11517 52 08230325 09 Crystals of two different binary sodium compounds have different radius ratios. Thus the negative ions in the two crystals must be different. A. True 9 B. False 0192633 B 13 11520 51 11531595 When a solid melts, A. the crystal lattice breaks down and heat is liberated in the process. B. the crystal lattice breaks down and heat is absorbed in the process. C. ordering in the crystal lattice remains the same but heat is used to increase the kinetic energy of the 9 molecules. 0193001 B 12 11525 31 00660189800409 04 2 OS Compounds are more complex than elements A. True 9 B. False 0193002 B 12 11526 32 03500189094309 0009 Since silicon is the second most abundant element in the earth's crust, it must be one of the cheapest to buy from a chemicals supplier. 9 A. True B. False 0193003 A 12 11529 31 10970588018509 0009 Stable, bulk samples of samples of matter carry little or no electric charge, that is, they are electrically neutral.
  21. 21. 9 A. True B. False 0193004 B 12 11531 31 14860293035109 0040 The limit of chemical subdivision is a molecule. 9 A. True B. False 0193005 B 12 11533 31 14860087041109 0040 A solution is an example of a homogeneous pure substance. 9 A. True B. False 0193006 B 12 11535 31 14860193041109 0040 All homogeneous matter is classified as pure substance. 9 A. True B. False 0193007 A 12 11537 31 14861149016109 0040 The vapor pressures of all substances increase as the temperature is increased. 9 A. True B. False 0193008 B 12 11539 31 03030189 0041 Phlogiston is the lightest element. 9 A. True B. False 0193201 A 12 11540 32 01690808011009 0009 Sodium chloride and potassium dichromate, both solids which are soluble in water, can probably be separated by taking advantage of differences in solubility. 9 A. True B. False 0193202 B 12 11543 32 15110438017409 0009 Whenever bubbles form within a sample of liquid, the liquid is said to be boiling. 9 A. True B. False 0193203 A 12 11545 31 14860087143609 0040 Solutions can be separated into component substances by physical means. 9 A. True B. False 0193204 A 12 11547 31 14860193020409 0040 Homogeneous matter can have a variable composition. 9 A. True B. False 0193205 B 12 11549 31 10971605000809 0009 When a sample of air is allowed to warm up without changing the total water content, the relative humidity usually increases. 9 A. True B. False 0193206 A 12 11552 32 0168 09 The properties of a homogeneous mixture are uniform throughout any single sample of the mixture. A. True 9 B. False 0193207 A 12 11554 32 0168 09 A mixture is a material which can be separated by physical means into the substances from which it is made. A. True 9 B. False 0193208 B 12 11556 32 0168 09 A mixture is a material which can be separated only by chemical means into the substances out of which it is made. A. True
  22. 22. 9 B. False 0193209 B 12 11558 32 0168 09 The properties of a heterogeneous mixture are uniform throughout any single sample of the mixture. A. True 9 B. False 0193210 A 12 11560 32 0087 09 The properties of a solution are uniform throughout any single sample of the solution. A. True 9 B. False 0193401 B 12 11562 31 14860411035109 0040 The unique simplest unit of a pure substance is an atom. 9 A. True B. False 0193402 A 12 11564 31 14860293018909 0040 Molecules of elements are always homoatomic. 9 A. True B. False 0193601 A 12 11565 31 00660649000509 0041 Compounds formed by electron transfer are called ionic compounds. 9 A. True B. False 0193602 B 12 11567 31 02930005035509 0041 Most molecules are held toghther by ionic bonds. 9 A. True B. False 0193603 B 12 11569 51 14861307065309 0040 In order for matter to be heterogeneous at least two different pure substances must be present. 9 A. True B. False 0193604 A 12 11571 31 14860066035109 0040 A compound contains only one kind of atom. 9 A. True B. False 0193605 A 12 11572 31 14860066041109 0040 A compound is an example of a pure substance. 9 A. True B. False 0193606 B 12 11573 31 000800870196 0041 Water is a solution of hydrogen and oxygen. 9 A. True B. False 0193607 B 12 11574 32 0037 09 A compound is a substance which can be separated by physical means into the elements out of which it is made. A. True 9 B. False 0193608 A 12 11576 32 0037 09 A compound is a substance which can be separated by chemical means into the elements out of which it is made. A. True 9 B. False 0193609 A 12 11578 32 0037 09 A compound is composed of two or more elements combined in definite proportions. A. True 9 B. False
  23. 23. 0193610 B 12 11580 32 0037 09 A compound is any material with two or more elements in it. A. True 9 B. False 0193611 A 12 11582 32 0037 09 The properties of a compound are uniform throughout any single sample of the compound. A. True 9 B. False 0193612 A 12 11584 32 00370168 09 Compounds are homogeneous mixtures. A. True 9 B. False 0193613 B 12 11585 31 0067 09 A binary compound is one which contains only two atoms. A. True 9 B. False 0193614 A 12 11587 31 0067 09 A binary compound is one which contains two and only two different elements. A. True 9 B. False 0193615 B 13 11589 31 0067 05 A binary compound is one which contains A. two atoms of the same element B. two and only two different elements 9 C. two ions with the same electrical charge 0193701 B 13 11592 31 06790785 0026 The chief outlet from the nitrogen pool is, in humans, A. tissue protein being sloughed off B. proteins lost in solid wastes 9 C. urinary nitrogen. 0195001 A 12 11595 31 01351418 0041 A chemical reaction always involves molecular changes. 9 A. True B. False 0195201 B 12 11597 31 04070226094309 0041 Most chemical reactions are reversible. 9 A. True B. False 0195202 A 12 11598 51 04070196035509 0043 Reactions with hydrogen are typically slow, because the H-H bond is quite strong. 9 A. True B. false. 0195203 A 12 11600 51 00150554039209 0043 Metals which dissolve appreciable quantities of hydrogen are used for hydrogenation catalysts. 9 A. True B. false. 0195204 B 12 11602 31 14990135080609 0009 The materials which are consumed, disappear, during a chemical reaction are called products. 9 A. True B. False 0195205 A 12 11604 52 09620977040709 0009
  24. 24. All of the following may be reasons why the actual product yield in a reaction is usually less than 100%: separation and purification result in losses; competing reactions form other products instead; the reaction hasn't stopped yet; not all the reactants are converted to desired product, even when the reaction has ceased. 9 A. True B. False 0195206 B 12 11609 31 01920172000809 0009 For any pure substance, the melting point is always a little above the freezing point. For instance, water will melt at a temperature above 0 degrees C and freeze at a temperature a little below 0 degrees C. 9 A. True B. False 0195207 A 12 11613 32 14860087041109 0040 Some pure substances may be decomposed into simpler pure substances by chemical change. 9 A. True B. False 0195208 B 12 11615 31 14860588035109 0040 An atom is the smallest unit possible from physical subdivision of matter. 9 A. True B. False 0195401 A 12 11617 31 03510293169709 0041 At any instant, all atoms and molecules have asymmetric charge distributions. 9 A. True B. False 0195402 A 12 11619 31 14140513117809 0009 The following statement is probably consistent with modern atomic theory: A positively charged sodium ion is smaller than a neutral sodium atom. 9 A. True B. False 0195403 B 12 11622 31 14861402034109 0040 The chemical properties of elements are very dependent on the number of nuclear neutrons. 9 A. True B. False 0196201 B 12 11624 32 04700189026409 One difference between an element and a compound is that compounds do not always follow the law of conservation of matter and energy while elements do. A. True 9 B. False 0196202 B 12 11627 32 0264 09 The law of conservation of matter and energy is generally, but not always, followed. A. True 9 B. False 0196203 B 12 11629 32 02640470 09 The burning of a candle is one of those rare exceptions to the law of conservation of matter and energy. A. True 9 B. False 0196204 A 12 11631 32 02640470 09 During a chemical reaction, matter and energy are always conserved. A. True
  25. 25. 9 B. False 0196205 B 12 11633 32 02640470 09 Nuclear explosions which directly convert matter into energy are examples of exceptions to the law of conservation of matter and energy. A. True 9 B. False 0196206 B 12 11636 32 02640470 09 An exothermic reaction loses heat to its surroundings. This is a violation of the law of conservation of matter and energy. A. True 9 B. False 0196207 B 12 11639 32 02640470013509 Some energy is always destroyed when a chemical reaction occurs. A. True 9 B. False 0196208 A 12 11641 32 0470 09 The law of conservation of energy implies that energy is not destroyed during a chemical reaction. A. True 9 B. False 0196209 B 12 11643 32 0470 09 The law of conservation of energy states that matter cannot be converted into energy. A. True 9 B. False 0196210 A 12 11645 32 0364 09 Matter and energy can be considered interrelated because one can be converted into the other. A. True 9 B. False 0196211 A 12 11647 32 0364 09 The amount of energy into which matter can be converted is 5 2 governed by the equation E = mc . A. True 9 B. False 0196212 B 12 11650 32 04700264 09 The law of conservation of matter and energy states that matter can be created but not destroyed. A. True 9 B. False 0196213 B 12 11652 32 0264 09 An exception to the law of conservation of matter and energy occurs in the explosion of a hydrogen bomb. A. True 9 B. False 0196401 A 12 11654 31 02950345149609 0009 In the light of current knowledge, we must view the law of constant composition as only a good approximation to observed behavior. 9 A. True B. False
  26. 26. 0196402 B 12 11657 31 14860513026509 0040 The law of definite composition is an exception to the atomic theory. 9 A. True B. False 0198001 A 12 11659 31 80040089008709 04 2WVW When molecules of an electrolyte are broken up in solution into their constituent radicals, each is charged, and these are called ions A. True 9 B. False 0198002 A 12 11662 31 07310351015909 0041 The ionization energy of an atom is the energy needed to remove its outermost electron. 9 A. True B. False 0199001 A 12 11664 31 02938004800309 04 2WVW Molecules are always in motion. A. True 9 B. False 0200001 ABABBBBA 83 11665 52 035103428001119006 ETS2 OS MACROITEM STEM 2Evaluate the statements according to the key. 2 A. The statement is true. 2 B. The statement is false. 0 C. The statement is neither true nor false in all cases. MACRO SUB-ITEM # 1 1 All atoms must have at least one electron in the nucleus. MACRO SUB-ITEM # 2 2 All atoms must have at least one neutron in the nucleus. MACRO SUB-ITEM # 3 3 Nuclei of all atoms carry a positive charge. MACRO SUB-ITEM # 4 4 All nuclei contain more neutrons than protons. MACRO SUB-ITEM # 5 The isotopes of uranium cannot be separated by means of chemical 5 processes. MACRO SUB-ITEM # 6 When an atom disintegrates all of its mass is accounted for 6 in the particles and lighter atoms that are released. MACRO SUB-ITEM # 7 In the disintegration of uranium, the barium atoms are the 7 product that continues the chain reaction. MACRO SUB-ITEM # 8 Chemically speaking all but the nucleus of an atom can be 9 disregarded. 0200002 A 12 11675 51 0438 0003 The x-ray diffraction pattern produced by a liquid shows a series of concentric rings. 9 A. True B. False 0210001 BAAAABAAC93 11677 31 027602638001119006 ETS2WVW MACROITEM STEM 2To answer the following questions, use the key below 2 A. a scientific fact well supported by evidence. 2 B. A highly probable theory. 0 C. A mere guess. MACRO SUB-ITEM # 1 An electron revolving around a positive nucleus is subjected to a centrifugal force equal and opposite to
  27. 27. 1 the electrostatic force attracting it by the nucleus. MACRO SUB-ITEM # 2 The atom for the most part is made up of a nucleus of protons and neutrons with the same number of electrons revolving around the nucleus as protons contained 2 in the nucleus. MACRO SUB-ITEM # 3 A useful element has been formed by merely projecting 3 a neutron into the nucleus of an atom. MACRO SUB-ITEM # 4 Researchers have been able to form many isotopes 4 that have never been discovered as natural particles. MACRO SUB-ITEM # 5 The electron is considered by scientists as the 5 smallest particle of matter. MACRO SUB-ITEM # 6 The atom is a tiny solar system with a nucleus of positive charges of electricity at its center and electrons 6 revolving around it. MACRO SUB-ITEM # 7 Robert Millikan discovered the value of the electrical 7 charge carried by the electron. MACRO SUB-ITEM # 8 8 The atom has locked in its nucleus a tremendous amount of energy. MACRO SUB-ITEM # 9 9 A fuel in all the larger electrical power plants. 0210002 B 12 11692 31 16830495034109 0041 A nucleon is a composite particle consisting of a neutron and a proton. 9 A. True B. False 0210003 A 12 11694 31 00970341026309 0041 The proton, neutron, and electron are stable particles that do not decay in free space. 9 A. True B. False 0210004 B 12 11696 51 07970097146609 0041 The old name for proton is positron. 9 A. True B. False 0210005 B 12 11697 51 03411686168709 0041 The antiparticle of the neutron is the neutrino. 9 A. True B. False 0210006 B 12 11699 51 16860343000909 0041 Neutrinos are readily absorbed by lead and iron. 9 A. True B. False 0210007 B 12 11701 51 16880449 09 0041 The distinction between mesons and hyperons is that mesons are unstable while hyperons are stable. 9 A. True B. False 0210008 A 12 11703 31 00971486044509 0040 Neutrons and protons weigh approximately the same. 9 A. True B. False 0210009 A 12 11705 31 03421486018509 0040 All nuclei are positively charged. 9 A. True B. False 0210010 A 12 11706 31 14860445026309 0040 The weight of 2000 electrons is less than that of 2000 protons.
  28. 28. 9 A. True B. False 0210011 A 12 11708 32 15711285035809 0009 The extent of deflection in an electrostatic field is greater for a beta-particle than for an alpha-particle. 9 A. True B. False 0210012 A 12 11710 31 05131486 0003 Goldstein's experiments with discharge tubes proved that atoms contain positrons as well as electrons. 9 A. True B. False 0210013 A 12 11712 31 03571486 0003 Rutherford's experiments showed that the nucleus of an atom is extremely small. 9 A. True B. False 0210014 B 12 11714 31 00701486 0003 In the process of losing an electron from its outer shell, a neutral (uncharged) atom acquires a negative charge. 9 A. True B. False 0210015 A 12 11716 31 026314860097 0003 The mass-to-charge ratio of an electron is lower than that of a proton. 9 A. True B. False 0210016 B 12 11718 31 03851486 0003 The positive particles formed in a Goldstein discharge tube are all alpha particles. 9 A. True B. False 0211001 B 14 11720 31 02630027800111 06 ETS2WVW When electrons are emitted from a clean zinc plate illuminated by ultra-violet light the kinetic energy of an emitted electron is A. directly proportional to the intensity of the illumination B. dependent only on the frequency of the incident light C. independent of the frequency of the incident light D. directly proportional to the absolute temperature of 9 metal 0211002 A 12 11726 51 02760263168909 0041 The theory of the electron was developed by Dirac. 9 A. True B. False 0211003 B 12 11728 32 02630097 09 In relation to the proton, the electron is about the same mass and of opposite charge. A. True 9 B. False 0211004 A 12 11730 31 02630097 09 In relation to the proton, the electron is many times lighter and of opposite charge. A. True 9 B. False 0211005 B 12 11732 31 02630097 09 In relation to the proton, the electron is many times heavier and of opposite charge. A. True 9 B. False
  29. 29. 0211006 B 12 11734 31 02630341 09 In relation to the electron, the neutron is many times heavier and of opposite charge. A. True 9 B. False 0211007 B 12 11736 31 02630341 09 In relation to the electron, the neutron is many times lighter and negative in charge. A. True 9 B. False 0211008 B 12 11738 31 00970341 09 In relation to the proton, the neutron is many times heavier and negative in charge. A. True 9 B. False 0211009 A 12 11740 31 03410097 09 In relation to the neutron, the proton is about the same mass and positively charged. A. True 9 B. False 0211010 A 12 11742 31 02630097 09 The charges on the electron and proton are equal but opposite in sign. A. True 9 B. False 0211011 B 12 11744 31 00970341 09 The charges on the proton and neutron are equal but opposite in sign. A. True 9 B. False 0211013 B 12 11746 31 02630341 09 The charges on the electron and neutron are not equal but they have the same electrical sign. A. True 9 B. False 0211101 A 13 11748 31 05900571 0026 Whether or not a given beam of radiation can eject electrons from a metal surface is determined solely by 9 A. its frequency B. its intensity C. its speed. 0211102 A 12 11751 31 057103280263 0041 The photoelectric effect is the emission of electrons when light is shined on a metal surface. 9 A. True B. False 0213001 A 12 11753 31 03370189034209 0041 The atomic number of an element is equal to the number of protons in its nucleus. 9 A. True B. False 0213002 B 12 11755 31 03420351009709 0041 The nuclei of all hydrogen atoms consist of single protons. 9 A. True B. False 0213003 A 12 11757 31 14860097035109 0040 All atoms contain protons. 9 A. True B. False
  30. 30. 0213004 B 12 11758 32 00970341 09 The number of protons in an atom is always equal to the number of neutrons. A. True 9 B. False 0213005 A 12 11760 32 00970263 09 The number of protons in a atom is always equal to the number of electrons. A. True 9 B. False 0215001 B 12 11762 31 03410353009709 0041 The neutron is an isotope of the proton. 9 A. True B. False 0215002 B 12 11763 51 06200341 09 0041 The half-life of the free neutron is 1,600 years. 9 A. True B. False 0215003 B 12 11765 32 03410263 09 The number of neutrons in a atom is always equal to the number of electrons. A. True 9 B. False 0215004 B 12 11767 32 00970263034109 All atoms of the same element must contain the same number of protons, neutrons, and electrons. A. True 9 B. False 0220001 A 13 11769 31 14020351018509 0009 The chemical properties of an atom are determined by its nuclear charge. 9 A. True B. False 0220002 A 12 11771 31 03510189026309 0009 All neutral atoms of a given element have the same number of electrons. 9 A. True B. False 0220003 A 12 11773 31 01950351026309 0009 The volume of an atom is essentially that volume occupied by the electrons. 9 A. True B. False 0220004 B 12 11775 31 01850351034209 0009 All the electrical charge in an atom is confined to the nucleus. 9 A. True B. False 0220005 B 12 11777 31 03371291026309 0009 The atomic number is always equal to the number of electrons in a particular atom. 9 A. True B. False 0220006 B 12 11779 31 08230185117809 0009 The radius of a negatively charged monatomic ion is always smaller than the radius of the parent neutral atom. 9 A. True B. False 0220007 B 12 11781 31 03420351148609 0040 The nucleus occupies about 1/2 the volume of an atom.
  31. 31. 9 A. True B. False 0221001 B 12 11783 51 03640606154009 0041 Einstein discovered that the line spectrum of an element contains specific wavelengths which are characteristic of the element alone. 9 A. True B. False 0221002 B 12 11786 51 13450351 09 0041 The Bohr theory of the atom is now known to be correct in all respects. 9 A. True B. False 0221003 A 12 11788 51 0351026309 0041 According to the Bohr model of the atom, atoms emit light when their electrons jump from outer to inner orbits. 9 A. True B. False 0221004 B 12 11790 51 02630351134009 0041 Electrons moving in circular paths outside of atoms emit electromagnetic radiation continuously. 9 A. True B. False 0221005 A 13 11792 31 033001961345 0026 The Bohr theory of the hydrogen atom A. successfully predicts its spectrum B. proves that light is a form of radiant energy 9 C. contradicts planck's quantum hypothesis. 0221006 A 12 11795 31 06541486018509 0040 Cathode rays possess a negative charge. 9 A. True B. False 0221007 A 12 11796 32 0189 09 An atom and an ion which contain the same number of protons but which have different masses are both of the same element. A. True 9 B. False 0221008 A 12 11799 32 0189 09 Two atoms or ions with the same number of protons and the same mass are both of the same element. A. True 9 B. False 0221009 A 12 11801 32 0189 09 Two neutral atoms which contain the same number of electrons and which have the same mass are both atoms of the same element. A. True 9 B. False 0221010 B 12 11804 32 0189 09 Two atoms or ions with the same number of neutrons and the same mass must both be of the same element. A. True 9 B. False 0221011 B 12 11806 32 0189 09 Two isotopes of the same element differ in the number of protons their atoms contain. A. True 9 B. False
  32. 32. 0221012 A 12 11808 32 0189 09 Two isotopes of the same element differ in the number of neutrons their atoms contain. A. True 9 B. False 0221013 B 12 11810 32 0342 09 The nucleus of an atom is composed of protons and electrons. A. True 9 B. False 0221014 B 12 11812 32 1110 09 Almost all the mass of an atom is contained in its protons and electrons. A. True 9 B. False 0221015 B 12 11814 32 1110 09 Almost all the mass of an atom is contained in its protons. A. True 9 B. False 0221016 A 12 11816 32 1110 09 Almost all the mass of an atom is contained in its protons and neutrons. A. True 9 B. False 0221017 A 12 11818 32 0342 09 The nucleus of an atom is composed of neutrons and protons. A. True 9 B. False 0230001 B 12 11820 31 03510445035109 0041 All atoms have weights which are exactly integral multiples of the weight of the hydrogen atom. 9 A. True B. False 0230002 B 13 11822 31 03531461 0026 5 235 In the symbol U , 235 means 4 92 A. the mass defect B. the isotope mass 9 C. the atomic number. 0230003 B 12 11824 31 00651413035309 0009 The atomic weight is an average number that takes into account all known isotopes of an element, including those prepared artificially in the laboratory. 9 A. True B. False 0230004 A 12 11827 32 1110 09 The mass number of an element is determined by the number of protons and neutrons. A. True 9 B. False 0230005 B 12 11829 32 1110 09 The mass number of an element is determined by the number of protons and electrons. A. True 9 B. False
  33. 33. 0230006 A 12 11831 32 1313 09 All atomic weights are based ultimately on carbon-12 having a weight of exactly 12.0000. A. True 9 B. False 0230007 B 12 11833 32 1313 09 All atomic weights are based ultimately on oxygen-16 having a weight of exactly 16.0000. A. True 9 B. False 0230008 A 12 11835 32 0065 09 An element with a higher atomic number than carbon will always have a greater number of protons in its nucleus than carbon does. A. True 9 B. False 0230009 A 12 11838 32 0065 09 An element with a lower atomic number than carbon will always have a lower number of protons in its nucleus than carbon does. A. True 9 B. False 0230010 B 12 11841 32 00650337 09 If atom X has a greater mass than atom Y, then its atomic number is surely greater also. A. True 9 B. False 0230011 A 12 11843 32 00650337 09 If element X has a greater number of protons in its nucleus than element Y, then its atomic number is surely greater also. A. True 9 B. False 0230012 B 12 11846 32 03370263 09 If an atom and an ion have the same number of electrons, then they are of the same element. A. True 9 B. False 0231001 A 12 11848 31 03530189009709 0041 The isotopes of an element have the same number of protons in the nuclei of their atoms but different numbers of neutrons. 9 A. True B. False 0231002 A 12 11850 31 07880847035309 0041 Deuterium and tritium are isotopes of hydrogen. 9 A. True B. False 0231003 B 12 11852 32 02930008 09 0043 A molecule of deuterium oxide weighs twice as much as a molecule of ordinary H O. 4 2 9 A. True B. False 0231004 B 12 11854 31 03531055033709 0009 An isotope is one of two or more atomic species having the same atomic number but different numbers of electrons.
  34. 34. 9 A. True B. False 0231005 A 12 11856 31 03371486035309 0040 Isotopes of an element have the same atomic number. 9 A. True B. False 0231006 B 12 11858 31 14860353034109 0040 Two isotopes can contain the same number of neutrons. 9 A. True B. False 0231007 A 12 11860 31 03531486 0003 Different isotopes of an element always have different numbers of neutrons in their nuclei. 9 A. True B. False 0231008 A 12 11862 31 01891486 Atoms of a given element always have the same number of protons. 9 A. True B. False 0231009 A 12 11864 31 06601486 0003 An atom can raise its neutron-proton ratio by ejecting a positron 9 A. True B. False 0231010 A 12 11866 31 06541486 0003 Cathode rays are streams of electrons. 9 A. True B. False 0231011 B 12 11867 31 12021486 0003 When exposed to a magnetic field, gamma rays exhibit no appreciable deflection. 9 A. True B. False 0231012 B 12 11869 51 120906621070 0041 Carbon 14 may be detected because of its distinctive color. 9 A. True B. False 0231013 B 12 11871 32 03530263 09 Neutral atoms of isotopes of the same element differ in the number of electrons they contain. A. True 9 B. False 0231014 C 13 11873 32 0353 05 To change one atom into another nuclide of the same element, add or subtract 9 A. electrons B. protons C. neutrons 0231015 B 13 11875 32 0353 05 For two atoms or ions of the same mass to be the same element, they must contain the same number of 9 A. electrons B. protons C. neutrons 0231016 B 12 11878 32 01890353 09 Atoms of two different elements with the same number of neutrons are isotopes. A. True 9 B. False 0233001 B 12 11880 31 14520189148609 0040 All of the 105 elements known today occur in nature. 9 A. True B. False 0233002 B 12 11882 31 14860415018909 0040 The known elements do not occur in exactly equal abundance but
  35. 35. 3 _______ their abundances are very close to being equal. 9 A. True B. False 0233003 B 12 11885 31 03531486041509 0040 All of the elements occur in nature in two isotopic forms. 9 A. True B. False 0233004 A 12 11887 31 14860415018909 0040 More than 90% of the earth's crust, water, and atmosphere is composed of only ten elements. 9 A. True B. False 0233005 B 12 11889 31 019603210189 0041 There is little hydrogen in the earth's atmosphere because this element is rare everywhere in the universe. 9 A. True B. False 0250001 A 13 11891 31 03370189800111 06 ETS2WVW The atomic number of an element is numerically equal to A. the number of protons in the nucleus of the atom B. the number of neutrons in the nucleus of the atom 9 C. the whole number nearest to its atomic weight 0250002 A 12 11894 31 14020189168409 0041 The chemical properties of an element are determined almost wholly by the electron clouds of its atoms. 9 A. True B. False 0250003 A 12 11896 31 07771486 0003 The largest number of electrons which can populate an isolated atom's valence shell is eight. 9 A. True B. False 0250004 A 12 11898 32 01890097033709 The atomic number of an element is determined by the number of protons in its atoms. A. True 9 B. False 0250005 B 12 11900 32 01890097033709 The atomic number of an element is determined by the number of neutrons in its atoms. A. True 9 B. False 0250006 B 12 11902 32 00370097026309 The atomic number of an element is determined by the total number of protons plus neutrons in an atom of the element. A. True 9 B. False 0251001 A 12 11904 52 11781423 09 0043 The manganous ion contains five unpaired 3d electrons. 9 A. True B. False 0251002 A 12 11906 51 07681178 09 0043 The mercurous ion is not paramagnetic. 9 A. True B. False 0251003 B 12 11907 51 0016 033809 0043 5 3+ 3+ Al and Cr have similar electronic configurations in their outermost shells.
  36. 36. 9 A. True B. False 0251004 A 12 11909 31 14860338035409 0040 The electronic configuration of argon (Ar) is 5 2 2 6 2 6 1s 2s 2p 3s 3p 9 A. True B. False 0251005 A 12 11911 32 07771486 0003 The ground-state electronic population of a sodium (Z = 11) ion is 5 2 2 6 1s 2s 2p 9 A. True B. False 0251006 A 12 11913 31 11281486 0003 The ground-state electronic configuration of a potassium (Z=19) ion is the same as that of a calcium (Z = 20) ion. 9 A. True B. False 0251007 A 12 11915 31 09291486 0003 The ground state of an atom is the one in which all electrons are in the lowest energy levels available to them. 9 A. True B. False 0251008 C 13 11917 32 0189 05 An atom and an ion of the same element differ only in the number of 9 A. protons B. neutrons C. electrons 0251009 B 12 11919 32 01890353 09 Atoms of two different elements with the same mass number are isotopes. A. True 9 B. False 0251010 A 12 11921 32 01890263 09 A positive ion of a certain element can be formed by removal of an electron from an atom of that element. A. True 9 B. False 0251011 B 12 11923 32 01891178 09 5 + The number of electrons in an ion such as K is greater than the number of protons. A. True 9 B. False 0251012 B 12 11926 32 01891178 09 A negative ion of a certain element can be formed by removal of a proton from an atom of that element. A. True 9 B. False 0251013 B 12 11928 32 01891178 09 A negative ion of a certain element can be formed by removal of an electron from an atom of that element. A. True 9 B. False 0251014 B 12 11930 32 01891178 09 A positive ion of a certain element can be formed by addition of a proton to the nucleus of that element.
  37. 37. A. True 9 B. False 0251015 A 12 11932 32 01891178 09 A negative ion of a certain element can be formed by addition of an electron to an atom of that element. A. True 9 B. False 0253001 B 12 11934 51 1540 09 0041 Emission spectra consist of bright lines on a dark background. 9 A. True B. False 0253002 A 12 11936 51 03510054032909 0041 Atoms emit and absorb light of the same frequencies. 9 A. True B. False 0253003 B 12 11938 51 03510907042909 0041 An atom in an excited state has a high velocity. 9 A. True B. False 0253004 A 12 11940 51 13620159 09 0043 The 4d and 5s subshells are very close in energy. 9 A. True B. False 0253005 A 13 11942 31 03800909 0026 When an electron in a hydrogen atom undergoes a change in its principal quantum number from 3 to 8, its energy is 9 A. increased B. decreased C. unchanged. 0253006 A 12 11945 31 01590263090909 0009 The energy associated with an electron in a given atom is almost fully described by specifying its value of the quantum number n. 9 A. True B. False 0253007 A 12 11948 31 14861362034709 0040 A subshell is a collection of orbitals that have the same energy. 9 A. True B. False 0253008 A 12 11950 31 14861362015909 0040 Electrons in the 3d subshell would have more energy than those in the 3p subshell. 9 A. True B. False 0270001 B 12 11952 51 05720351039209 0041 The quantum-mechanical theory of the atom restricts itself to physical quantities that can be measured. 9 A. True B. False 0270002 A 12 11954 51 16930351 09 0041 Quantum mechanics is an extension of Newtonian mechanics to the atom. 9 A. True B. False 0270003 B 12 11956 51 16930270026309 0041 Because quantum mechanics does not make definite predictions about the position and velocity of each electron in an atom, its correctness cannot be verified by experiment. 9 A. True B. False 0270004 B 13 11959 31 019603300572 0026 The hydrogen atomic spectrum requires that the hydrogen atom gain or lose energy
  38. 38. A. only in a vacuum tube B. in discrete amounts 9 C. as required by its environment. 0270005 A 13 11962 31 06120628 0026 A characteristic feature of waves is 9 A. diffraction B. internal friction C. typical mass 0270006 B 12 11964 52 05720067060609 0009 Without quantum theory, there probably would be no way of predicting the properties of element 110, yet to be discovered. 9 A. True B. False 0273001 A 13 11966 31 146914700572 0026 The Heisenberg uncertainty principle is based upon the fact that A. photons of high energy can disturb small pieces of matter B. the present state of precision of measuring atomic positions can be refined to an unlimited extent 9 C. actual experimental work always contains slight errors. 0273002 A 12 11970 31 14860909147009 0040 The larger the number (n) of a shell, the greater is the distance between the nucleus and the most probable position of a contained electron. 9 A. True B. False 0273003 A 12 11973 31 1211 0417 0041 It is impossible simultaneously to determine the position and velocity of an electron. 9 A. True B. False 0275001 B 12 11975 51 03470914150509 0009 An orbital diagram is a geometrical representation of the shape of an orbital. 9 A. True B. False 0275002 B 12 11977 31 14860347136209 0040 An orbital is a collection of subshells. 9 A. True B. False 0275003 A 12 11978 31 14860347038009 0040 An orbital has a definite size and shape which are related to the energy of the electrons it could contain. 9 A. True B. False 0275004 A 12 11980 31 14861362034709 0040 A 2p and a 3p subshell contain the same number of orbitals. 9 A. True B. False 0275005 B 12 11982 31 14860915091409 0040 An s orbital is shaped something like a four leaf clover. 9 A. True B. False 0275006 B 12 11984 51 14860347136209 0040 The maximum number of electrons possible in a d orbital is 10. 9 A. True B. False 0275007 A 12 11986 31 11281486 0003 If two electrons in an atom have the same spin and are both in p orbitals oriented in the same direction in space, they must be in different shells. 9 A. True B. False 0275008 B 12 11989 31 05861486 0003
  39. 39. Each electron in an atom revolves in an orbit around the nucleus, according to present-day theory. 9 A. True B. False 0277001 A 12 11991 51 0909 026309 0041 Four quantum numbers are required to characterize each electron in a complex atom. 9 A. True B. False 0277002 B 12 11993 51 16920263058609 0041 Electron spin refers to the motion of electrons in their orbits. 9 A. True B. False 0277003 A 12 11995 51 02630909035109 0041 No more than one electron in an atom can have the same set of quantum numbers. 9 A. True B. False 0277004 A 12 11997 51 05301497026309 0041 Both the direction and the magnitude of the angular momentum of an atomic electron are quantized. 9 A. True B. False 0277005 B 12 11999 31 14860909026309 0040 The maximum number of electrons in a shell with N = 3 is 10. 9 A. True B. False 0279001 B 12 12001 31 11280244019509 0041 The exclusion principle explains why crystals do not collapse into smaller volumes. 9 A. True B. False 0279002 A 12 12003 31 14860347026309 0040 The maximum number of electrons an orbital may contain does not vary with the type of orbital. 9 A. True B. False 0290001 CABCCBCC 83 12005 31 1 057390159016959006 ETS2WVW MACROITEM STEM 2The following questions refer to Figures 15 and 16. 2all atoms are made from the same three pieces in Figure 15. Every 2tiny atom is like a solar system. Its central "sun" has one or 2more protons, generally neutrons, too. The revolving "planets" 2are the electrons, one for each proton in the nucleus, because 2plus and minus must balance in the atom. 2The opposite charges attract but high speed keeps the electrons 2in their circular paths. All the weight of the atom may be 2considered to be in the nucleus since the electron weighs only 21/1850 of the proton. 2The atom is mostly empty space. If the nucleus were enlarged 2to the size of a baseball, the electron would be a mere speck 22000 feet away. Electrons supply the energy for chemical reactions 2like burning coal or the explosion of tnt. The nucleus 2evades all ordinary chemical reactons. Its energy can be 2released only by direct hits on the nucleus to break the bonds 2that hold the protons and neutrons in a tight bundle. 2Uranium is nature's heaviest atom called U-238. It is not 2directly usable for energy release, but an element may have 2several isotopes--alternate forms with the same number of 2protons but slightly different numbers of neutrons. The material 2needed for direct atomic energy release is U-235 which consists 2of only .7 per cent of natural uranium. The separation of the 2uranium isotopes is difficult since they are chemically the same 2element.
  40. 40. 2Relatively slow neutron bullets can split U-235 into lighter 2atoms and give several neutrons to split other U-235 atoms 2setting up a chain of explosions that may sweep through a block 2of U-235 releasing energy equivalent to 11,400,000 kilowatt-hours 2per pound. 2We now have a man-made new element, number 94 with 145 2neutrons, called plutonium which can also be split like u-235. 2in an elementary way the principle of atomic explosion can 2be shown by Figure 16. 2To answer the following questions, select from the key the 2most appropriate response. 2 A. The first part of the statement is true, and its truth 2 is supported by the reason given in the statement. 2 B. The first part of the statement is true, but its truth is 2 not supported by the reason given in the statement. 0 C. The first part of the statement is false. MACRO SUB-ITEM # 1 The atoms of all elements are neutral because the neutron 1 has no electrical charge. MACRO SUB-ITEM # 2 Splitting uranium into other elements produces elements of slightly different atomic weights because some neutrons 2 are given off in the action. MACRO SUB-ITEM # 3 3 Plutonium is listed as element 94 because it has 94 electrons. MACRO SUB-ITEM # 4 U-238 has the same atomic weight as U-234 because 4 U-234 is an