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Name…………………………………………….
Date…………………………….
TOPIC 2 ELEMENTS, COMPOUNDS AND MIXTURES
ACTIVITIES
Mixtures are absolutely everywhere you look. Mixtures are the form for most
things in nature. Rocks, air, or the ocean, they are just about anything you
find. They are substances held together by physical forces, not chemical.
A mixture is a combination of substances in which the individual substances
keep their own properties. If you put sand into a glass of water, it is
considered to be a mixture. You can always tell a mixture because each of the
substances can be separated from the group in different physical ways. You
can always get the sand out of the water by filtering the water away.
There are two different types of mixtures. Chemists use the terms
heterogeneous and homogeneous. Homogeneous mixtures have one phase
and uniform composition. Solutions are great examples of homogeneous
mixtures; a solution is a mixture of solute and solvent. The solute is the
substance that dissolves; the solvent is the substance that does the
dissolving. Heterogeneous mixtures used to describe substances in which you
can see more than one colour or type of matter. Heterogeneous substances
have more than one phase and a no uniform composition. Mixing sand and
iron filings might create a heterogeneous mixture.
A pure substance contains only one substance and nothing else, distilled
water is an example. That fact means that there are just water molecules in
the liquid. A pure substance is a form of matter that has a definite composition
and specific properties. Any pure substance that contains only one kind of an
atom is known as an element: Fe(s), N2(g) ; a compound is formed when two
or more elements are chemically joined. Salt (NaCl), and sugar are examples
of compounds.
Physical processes separate mixtures of different compounds. Simple
physical separation might use the process of filtration, such as removing sand
from water; you can also use different boiling points and distillation.
Evaporation is used to obtain the solute from a solution and chromatography
is used to separate out one colour from a mixture of colours.
Chemical methods are used to change the atomic composition of compounds.
When chemical methods are used, you change the original ingredients and
the entire mixture changes.
Adapted from
http://www.chem4kids.com/files/matter_mixture.htm
Felisa Pinilla Practical work in Chemistry
1
Name…………………………………………….
Date…………………………….
1. Work in pairs. In the spaces provided, describe the distinguishing
characteristics of the major categories of matter.
MIXTURES
HOMOGENEOUS
MIXTURES
HETEROGENEOUS
MIXTURES
SOLUTIONS
ELEMENTS
COMPOUNDS
Felisa Pinilla Practical work in Chemistry
2
Name…………………………………………….
Date…………………………….
2. Complete the diagram with the following words: salt (NaCl), matter,
solution, iron (Fe), homogeneous, pure substance, oil+vinegar, air,
heterogeneous, compound, element.
3. Classify each of the following substances as; an element, a compound, a
solution, or a heterogeneous mixture.
1. Sand 2. Salt 3. Pure Water 4. Soil
5. Soda 6. Pure Air 7. Carbon
Dioxide
8. Gold
9. Bronze 10. Oxygen 11. Salad
Dressing
12. Salt Water
4. Complete the table with different processes to separate mixtures
PROCESS What it is used for Examples
Used for separating a solid from
a liquid
Separating SAND from water.
Used to obtain the solute from a
solution
for obtaining SALT from salty
water
Used to obtain the solvent from
a solution
for obtaining pure water from
sea water
Used to separate out one colour
from a mixture of colours
for separating out the colours in
black ink
HOMEWORK ON THE INTERNET
Felisa Pinilla Practical work in Chemistry
3
Name…………………………………………….
Date…………………………….
1. Welcome to the mixtures lab! Once you separate a mixture use the
chart to record your findings.
http://www.harcourtschool.com/activity/mixture/mixture.html
Mixtures Separation mechanism Physical properties that
allow separation
Sand and iron filings
Salad
Salt and water
Muddy water
Dust in air
2. Go to http://www.chem4kids.com/extras/quiz_mattermix/index.html
Answer questions from the quiz on mixtures, remember that you have to
justify your answer.
The first one is done as an example.
Question 1:
Mixtures are always combinations of the same compounds that are at
different states
False. You can make mixtures out of compounds that are different states of
matter and you can also make mixture out of compounds that are the same
state of matter
Question 2:
You can separate all mixtures by filtration.
……………………………………………………………………………………..
……………………………………………………………………………………..
……………………………………………………………………………………..
……………………………………………………………………………………….
Question 4:
All mixtures are defined as "heterogeneous."
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
Question 5:
Mixtures are generally separated by what methods?
Felisa Pinilla Practical work in Chemistry
4
Name…………………………………………….
Date…………………………….
Chemical
Physical
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
Question 6:
Only specific compounds can be combined to form mixtures.
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
Question 7:
All solutions are mixtures, but not all mixtures are solutions
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
…………………………………………………………………………………………
Question 9:
Which of these is not a mixture?
Solution
Alloy
Amalgam
These are all mixtures
…………………………………………………………………………………………..
…………………………………………………………………………………………..
………………………………………………………………………………………….
………………………………………………………………………………………….
Question 10:
Which of these is not a mixture?
Oil and water
Sand and water
Coca Cola
All are mixtures
…………………………………………………………………………………………
………………………………………………………………………………………..
………………………………………………………………………………………..
………………………………………………………………………………………..
COMPLEMENTARY ACTIVITIES
Felisa Pinilla Practical work in Chemistry
5
Name…………………………………………….
Date…………………………….
www.science-teachers.com/physical.htm
1 2 3 4
5
6
7
8 9
10 11
12 13 14
15 16
17
18
19 20 21
22 23
24
25
26
Across
5 He (6)
6 Ca (7)
8 O (6)
9 Fe (4)
10 Cu (6)
12 K (9)
15 Na (6)
16 Au (4)
18 H (8)
19 Be (9)
24 Cl (8)
25 S (7)
26 Ne (4)
Down
1 N (8)
2 Ni (6)
3 Al (9)
4 As (7)
7 Zn (4)
11 P (10)
12 Pu (9)
13 Ar (5)
14 Si (7)
17 F (8)
19 B (5)
20 Pb (4)
21 Hg (7)
22 Ag (6)
23 C (6)
Felisa Pinilla Practical work in Chemistry
6
Name…………………………………………….
Date…………………………….
www.science-teachers.com/physical.htm
Across
1 Isotope of hydrogen with
one neutron. (9)
6 When two atoms of
different elements
combine chemically,
what does it produce?
(7)
7 The lightest element. (8)
8 Elements that lend
electrons in chemical
reactions. (5)
9 A nuclear reaction in
which the nucleus of two
atoms combine to form
one nucleus. (6)
11 Helium, neon, argon, or
krypton. (5,3)
13 Where electrons reside
in the atom. (5)
15 The most common
isotope of carbon. (6,6)
16 The isotope of carbon
that is used for dating
things in archeology.
(6,8)
17 Elements that borrow
electrons in chemical
reactions. (8)
Down
2 An atom of an element with a different number of neutrons
in the nucleus. (7)
3 Unstable. (11)
4 Positively charged particle in the nucleus. (6)
5 The center of an atom. (7)
9 A nuclear reaction in which an atom's nucleus splits to
form two new atoms. (7)
10 Negatively charged particle. (8)
12 Isotope of hydrogen with two neutrons. (7)
14 Particle with no charge. (7)
Felisa Pinilla Practical work in Chemistry
7
Name…………………………………………….
Date…………………………….
Periodic Table of the Elements Quiz www.science-teachers.com/physical.htm
Fill in the blanks with the atomic
symbols of the first 20 elements.
And then write the element names
in the blanks below.
Key:
element name
atomic number
symbol
atomic weight
scandium
21
Sc
44.95591
titanium
22
Ti
47.867
vanadium
23
V
50.9415
chromium
24
Cr
51.9961
manganese
25
Mn
54.93805
iron
26
Fe
55.845
cobalt
27
Co
58.9332
nickel
28
Ni
58.6934
copper
29
Cu
63.546
zinc
30
Zn
65.409
gallium
31
Ga
69.723
germanium
32
Ge
72.64
arsenic
33
As
74.9216
selenium
34
Se
78.96
bromine
35
Br
79.904
krypton
36
Kr
83.798
rubidium
37
Rb
85.4678
strontium
38
Sr
87.62
yttrium
39
Y
88.90585
zirconium
40
Zr
91.225
niobium
41
Nb
92.90638
molybdenu
m
42
Mo
95.94
technetium
43
Tc
[98]
ruthenium
44
Ru
101.07
rhodium
45
Rh
102.9055
palladium
46
Pd
106.42
silver
47
Ag
107.8682
cadmium
48
Cd
112.411
indium
49
In
114.818
tin
50
Sn
118.710
antimony
51
Sb
121.760
tellurium
52
Te
127.60
iodine
53
I
126.9045
xenon
54
Xe
131.293
(1)
(2)
(3)
(4)
(5)
__________________
__________________
__________________
__________________
__________________
(6)
(7)
(8)
(9)
(10)
__________________
__________________
__________________
__________________
__________________
(11)
(12)
(13)
(14)
(15)
__________________
__________________
__________________
__________________
__________________
(16)
(17)
(18)
(19)
(20)
__________________
__________________
__________________
__________________
__________________
Hint: Al, Ar, B, Be, C, Ca, Cl, F, H, He, K, Li, Mg, N, Na, Ne, O, P, S, Si,
Felisa Pinilla Practical work in Chemistry
8
Name…………………………………………….
Date…………………………….
Periodic Table of the Elements www.science-teachers.com/physical.htm
hydrogen
1
H
1.00794
Key:
helium
2
He
4.002602
lithium
3
Li
6.941
beryllium
4
Be
9.012182
element name
atomic number
symbol
atomic weight
boron
5
B
10.811
carbon
6
C
12.0107
nitrogen
7
N
14.00674
oxygen
8
O
15.9994
fluorine
9
F
18.9984
neon
10
Ne
20.1797
sodium
11
Na
22.98977
magnesium
12
Mg
24.3050
aluminium
13
Al
26.981538
silicon
14
Si
28.0855
phosphorus
15
P
30.97376
sulphur
16
S
32.065
chlorine
17
Cl
35.453
argon
18
Ar
39.984
potassium
19
K
39.0983
calcium
20
Ca
40.078
scandium
21
Sc
44.95591
titanium
22
Ti
47.867
vanadium
23
V
50.9415
chromium
24
Cr
51.9961
manganese
25
Mn
54.93805
iron
26
Fe
55.845
cobalt
27
Co
58.9332
nickel
28
Ni
58.6934
copper
29
Cu
63.546
zinc
30
Zn
65.409
gallium
31
Ga
69.723
germanium
32
Ge
72.64
arsenic
33
As
74.9216
selenium
34
Se
78.96
bromine
35
Br
79.904
krypton
36
Kr
83.798
rubidium
37
Rb
85.4678
strontium
38
Sr
87.62
yttrium
39
Y
88.90585
zirconium
40
Zr
91.225
niobium
41
Nb
92.90638
molybdenu
m
42
Mo
95.94
technetium
43
Tc
[98]
ruthenium
44
Ru
101.07
rhodium
45
Rh
102.9055
palladium
46
Pd
106.42
silver
47
Ag
107.8682
cadmium
48
Cd
112.411
indium
49
In
114.818
tin
50
Sn
118.710
antimony
51
Sb
121.760
tellurium
52
Te
127.60
iodine
53
I
126.9045
xenon
54
Xe
131.293
caesium
55
Cs
132.90545
barium
56
Ba
137.327
lutetium
71
Lu
174.967
hafnium
72
Hf
178.49
tantalum
73
Ta
180.9479
tungsten
74
W
183.84
rhenium
75
Re
186.207
osmium
76
Os
190.23
iridium
77
Ir
192.217
platinum
78
Pt
195.078
gold
79
Au
196.96655
mercury
80
Hg
200.59
thallium
81
Tl
204.3833
lead
82
Pb
207.2
bismuth
83
Bi
208.980
polonium
84
Po
[209]
astatine
85
At
[210]
radon
86
Rn
[222]
francium
87
Fr
[223]
radium
88
Ra
[226]
lawrencium
103
Lr
[262]
rutherfordium
104
Rf
[261]
dubnium
105
Db
[262]
seaborgium
106
Sg
[266]
bohrium
107
Bh
[264]
hassium
108
Hs
[269]
meitnerium
109
Mt
[268]
darmstadtium
110
Ds
[271]
roentgenium
111
Rg
[272]
ununbium
112
Uub
[285]
ununquadiu
m
114
Uuq
[289]
lanthanum
57
La
138.9055
cerium
58
Ce
140.116
praseodymiu
m
59
Pr
140.90765
neodymium
60
Nd
144.24
promethium
61
Pm
[145]
samarium
62
Sm
150.36
europium
63
Eu
151.964
gadolinium
64
Gd
157.25
terbium
65
Tb
158.9253
dysprosium
66
Dy
162.50
holmium
67
Ho
164.930
erbium
68
Er
167.259
thulium
69
Tm
168.934
ytterbium
70
Yb
173.04
Felisa Pinilla Practical work in Chemistry
9
Name…………………………………………….
Date…………………………….
actinium
89
Ac
[227]
thorium
90
Th
232.038
protactinium
91
Pa
231.0359
uranium
92
U
238.0289
neptunium
93
Np
[237]
plutonium
94
Pu
[244]
americium
95
Am
[243]
curium
96
Cm
[247]
berkelium
97
Bk
[247]
californium
98
Cf
[251]
einsteinium
99
Es
[252]
fermium
100
Fm
[257]
mendelev
101
Md
[258]
nobelium
102
No
[259]
Felisa Pinilla Practical work in Chemistry
10
Name…………………………………………….
Date…………………………….
Felisa Pinilla Practical work in Chemistry
11

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Topic 2. Mixtures Activities

  • 1. Name……………………………………………. Date……………………………. TOPIC 2 ELEMENTS, COMPOUNDS AND MIXTURES ACTIVITIES Mixtures are absolutely everywhere you look. Mixtures are the form for most things in nature. Rocks, air, or the ocean, they are just about anything you find. They are substances held together by physical forces, not chemical. A mixture is a combination of substances in which the individual substances keep their own properties. If you put sand into a glass of water, it is considered to be a mixture. You can always tell a mixture because each of the substances can be separated from the group in different physical ways. You can always get the sand out of the water by filtering the water away. There are two different types of mixtures. Chemists use the terms heterogeneous and homogeneous. Homogeneous mixtures have one phase and uniform composition. Solutions are great examples of homogeneous mixtures; a solution is a mixture of solute and solvent. The solute is the substance that dissolves; the solvent is the substance that does the dissolving. Heterogeneous mixtures used to describe substances in which you can see more than one colour or type of matter. Heterogeneous substances have more than one phase and a no uniform composition. Mixing sand and iron filings might create a heterogeneous mixture. A pure substance contains only one substance and nothing else, distilled water is an example. That fact means that there are just water molecules in the liquid. A pure substance is a form of matter that has a definite composition and specific properties. Any pure substance that contains only one kind of an atom is known as an element: Fe(s), N2(g) ; a compound is formed when two or more elements are chemically joined. Salt (NaCl), and sugar are examples of compounds. Physical processes separate mixtures of different compounds. Simple physical separation might use the process of filtration, such as removing sand from water; you can also use different boiling points and distillation. Evaporation is used to obtain the solute from a solution and chromatography is used to separate out one colour from a mixture of colours. Chemical methods are used to change the atomic composition of compounds. When chemical methods are used, you change the original ingredients and the entire mixture changes. Adapted from http://www.chem4kids.com/files/matter_mixture.htm Felisa Pinilla Practical work in Chemistry 1
  • 2. Name……………………………………………. Date……………………………. 1. Work in pairs. In the spaces provided, describe the distinguishing characteristics of the major categories of matter. MIXTURES HOMOGENEOUS MIXTURES HETEROGENEOUS MIXTURES SOLUTIONS ELEMENTS COMPOUNDS Felisa Pinilla Practical work in Chemistry 2
  • 3. Name……………………………………………. Date……………………………. 2. Complete the diagram with the following words: salt (NaCl), matter, solution, iron (Fe), homogeneous, pure substance, oil+vinegar, air, heterogeneous, compound, element. 3. Classify each of the following substances as; an element, a compound, a solution, or a heterogeneous mixture. 1. Sand 2. Salt 3. Pure Water 4. Soil 5. Soda 6. Pure Air 7. Carbon Dioxide 8. Gold 9. Bronze 10. Oxygen 11. Salad Dressing 12. Salt Water 4. Complete the table with different processes to separate mixtures PROCESS What it is used for Examples Used for separating a solid from a liquid Separating SAND from water. Used to obtain the solute from a solution for obtaining SALT from salty water Used to obtain the solvent from a solution for obtaining pure water from sea water Used to separate out one colour from a mixture of colours for separating out the colours in black ink HOMEWORK ON THE INTERNET Felisa Pinilla Practical work in Chemistry 3
  • 4. Name……………………………………………. Date……………………………. 1. Welcome to the mixtures lab! Once you separate a mixture use the chart to record your findings. http://www.harcourtschool.com/activity/mixture/mixture.html Mixtures Separation mechanism Physical properties that allow separation Sand and iron filings Salad Salt and water Muddy water Dust in air 2. Go to http://www.chem4kids.com/extras/quiz_mattermix/index.html Answer questions from the quiz on mixtures, remember that you have to justify your answer. The first one is done as an example. Question 1: Mixtures are always combinations of the same compounds that are at different states False. You can make mixtures out of compounds that are different states of matter and you can also make mixture out of compounds that are the same state of matter Question 2: You can separate all mixtures by filtration. …………………………………………………………………………………….. …………………………………………………………………………………….. …………………………………………………………………………………….. ………………………………………………………………………………………. Question 4: All mixtures are defined as "heterogeneous." ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Question 5: Mixtures are generally separated by what methods? Felisa Pinilla Practical work in Chemistry 4
  • 5. Name……………………………………………. Date……………………………. Chemical Physical ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Question 6: Only specific compounds can be combined to form mixtures. ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Question 7: All solutions are mixtures, but not all mixtures are solutions ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… Question 9: Which of these is not a mixture? Solution Alloy Amalgam These are all mixtures ………………………………………………………………………………………….. ………………………………………………………………………………………….. …………………………………………………………………………………………. …………………………………………………………………………………………. Question 10: Which of these is not a mixture? Oil and water Sand and water Coca Cola All are mixtures ………………………………………………………………………………………… ……………………………………………………………………………………….. ……………………………………………………………………………………….. ……………………………………………………………………………………….. COMPLEMENTARY ACTIVITIES Felisa Pinilla Practical work in Chemistry 5
  • 6. Name……………………………………………. Date……………………………. www.science-teachers.com/physical.htm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Across 5 He (6) 6 Ca (7) 8 O (6) 9 Fe (4) 10 Cu (6) 12 K (9) 15 Na (6) 16 Au (4) 18 H (8) 19 Be (9) 24 Cl (8) 25 S (7) 26 Ne (4) Down 1 N (8) 2 Ni (6) 3 Al (9) 4 As (7) 7 Zn (4) 11 P (10) 12 Pu (9) 13 Ar (5) 14 Si (7) 17 F (8) 19 B (5) 20 Pb (4) 21 Hg (7) 22 Ag (6) 23 C (6) Felisa Pinilla Practical work in Chemistry 6
  • 7. Name……………………………………………. Date……………………………. www.science-teachers.com/physical.htm Across 1 Isotope of hydrogen with one neutron. (9) 6 When two atoms of different elements combine chemically, what does it produce? (7) 7 The lightest element. (8) 8 Elements that lend electrons in chemical reactions. (5) 9 A nuclear reaction in which the nucleus of two atoms combine to form one nucleus. (6) 11 Helium, neon, argon, or krypton. (5,3) 13 Where electrons reside in the atom. (5) 15 The most common isotope of carbon. (6,6) 16 The isotope of carbon that is used for dating things in archeology. (6,8) 17 Elements that borrow electrons in chemical reactions. (8) Down 2 An atom of an element with a different number of neutrons in the nucleus. (7) 3 Unstable. (11) 4 Positively charged particle in the nucleus. (6) 5 The center of an atom. (7) 9 A nuclear reaction in which an atom's nucleus splits to form two new atoms. (7) 10 Negatively charged particle. (8) 12 Isotope of hydrogen with two neutrons. (7) 14 Particle with no charge. (7) Felisa Pinilla Practical work in Chemistry 7
  • 8. Name……………………………………………. Date……………………………. Periodic Table of the Elements Quiz www.science-teachers.com/physical.htm Fill in the blanks with the atomic symbols of the first 20 elements. And then write the element names in the blanks below. Key: element name atomic number symbol atomic weight scandium 21 Sc 44.95591 titanium 22 Ti 47.867 vanadium 23 V 50.9415 chromium 24 Cr 51.9961 manganese 25 Mn 54.93805 iron 26 Fe 55.845 cobalt 27 Co 58.9332 nickel 28 Ni 58.6934 copper 29 Cu 63.546 zinc 30 Zn 65.409 gallium 31 Ga 69.723 germanium 32 Ge 72.64 arsenic 33 As 74.9216 selenium 34 Se 78.96 bromine 35 Br 79.904 krypton 36 Kr 83.798 rubidium 37 Rb 85.4678 strontium 38 Sr 87.62 yttrium 39 Y 88.90585 zirconium 40 Zr 91.225 niobium 41 Nb 92.90638 molybdenu m 42 Mo 95.94 technetium 43 Tc [98] ruthenium 44 Ru 101.07 rhodium 45 Rh 102.9055 palladium 46 Pd 106.42 silver 47 Ag 107.8682 cadmium 48 Cd 112.411 indium 49 In 114.818 tin 50 Sn 118.710 antimony 51 Sb 121.760 tellurium 52 Te 127.60 iodine 53 I 126.9045 xenon 54 Xe 131.293 (1) (2) (3) (4) (5) __________________ __________________ __________________ __________________ __________________ (6) (7) (8) (9) (10) __________________ __________________ __________________ __________________ __________________ (11) (12) (13) (14) (15) __________________ __________________ __________________ __________________ __________________ (16) (17) (18) (19) (20) __________________ __________________ __________________ __________________ __________________ Hint: Al, Ar, B, Be, C, Ca, Cl, F, H, He, K, Li, Mg, N, Na, Ne, O, P, S, Si, Felisa Pinilla Practical work in Chemistry 8
  • 9. Name……………………………………………. Date……………………………. Periodic Table of the Elements www.science-teachers.com/physical.htm hydrogen 1 H 1.00794 Key: helium 2 He 4.002602 lithium 3 Li 6.941 beryllium 4 Be 9.012182 element name atomic number symbol atomic weight boron 5 B 10.811 carbon 6 C 12.0107 nitrogen 7 N 14.00674 oxygen 8 O 15.9994 fluorine 9 F 18.9984 neon 10 Ne 20.1797 sodium 11 Na 22.98977 magnesium 12 Mg 24.3050 aluminium 13 Al 26.981538 silicon 14 Si 28.0855 phosphorus 15 P 30.97376 sulphur 16 S 32.065 chlorine 17 Cl 35.453 argon 18 Ar 39.984 potassium 19 K 39.0983 calcium 20 Ca 40.078 scandium 21 Sc 44.95591 titanium 22 Ti 47.867 vanadium 23 V 50.9415 chromium 24 Cr 51.9961 manganese 25 Mn 54.93805 iron 26 Fe 55.845 cobalt 27 Co 58.9332 nickel 28 Ni 58.6934 copper 29 Cu 63.546 zinc 30 Zn 65.409 gallium 31 Ga 69.723 germanium 32 Ge 72.64 arsenic 33 As 74.9216 selenium 34 Se 78.96 bromine 35 Br 79.904 krypton 36 Kr 83.798 rubidium 37 Rb 85.4678 strontium 38 Sr 87.62 yttrium 39 Y 88.90585 zirconium 40 Zr 91.225 niobium 41 Nb 92.90638 molybdenu m 42 Mo 95.94 technetium 43 Tc [98] ruthenium 44 Ru 101.07 rhodium 45 Rh 102.9055 palladium 46 Pd 106.42 silver 47 Ag 107.8682 cadmium 48 Cd 112.411 indium 49 In 114.818 tin 50 Sn 118.710 antimony 51 Sb 121.760 tellurium 52 Te 127.60 iodine 53 I 126.9045 xenon 54 Xe 131.293 caesium 55 Cs 132.90545 barium 56 Ba 137.327 lutetium 71 Lu 174.967 hafnium 72 Hf 178.49 tantalum 73 Ta 180.9479 tungsten 74 W 183.84 rhenium 75 Re 186.207 osmium 76 Os 190.23 iridium 77 Ir 192.217 platinum 78 Pt 195.078 gold 79 Au 196.96655 mercury 80 Hg 200.59 thallium 81 Tl 204.3833 lead 82 Pb 207.2 bismuth 83 Bi 208.980 polonium 84 Po [209] astatine 85 At [210] radon 86 Rn [222] francium 87 Fr [223] radium 88 Ra [226] lawrencium 103 Lr [262] rutherfordium 104 Rf [261] dubnium 105 Db [262] seaborgium 106 Sg [266] bohrium 107 Bh [264] hassium 108 Hs [269] meitnerium 109 Mt [268] darmstadtium 110 Ds [271] roentgenium 111 Rg [272] ununbium 112 Uub [285] ununquadiu m 114 Uuq [289] lanthanum 57 La 138.9055 cerium 58 Ce 140.116 praseodymiu m 59 Pr 140.90765 neodymium 60 Nd 144.24 promethium 61 Pm [145] samarium 62 Sm 150.36 europium 63 Eu 151.964 gadolinium 64 Gd 157.25 terbium 65 Tb 158.9253 dysprosium 66 Dy 162.50 holmium 67 Ho 164.930 erbium 68 Er 167.259 thulium 69 Tm 168.934 ytterbium 70 Yb 173.04 Felisa Pinilla Practical work in Chemistry 9