The document provides information about the parts of an atom including labels for the proton, neutron, and nucleus locations. It also summarizes important scientists and their discoveries relating to atomic structure from Democritus' idea of atoms to Bohr's model of the atom. Tables are included that classify elements by their groups and provide examples as well as information about their typical reactivity and valence electrons.

1. 2nd 6 weeks Study Guide Answers

2. Parts of the Atom
Label the parts of the atom.
A
B
C

3. Particle Neutron
Location Nucleus
Charge Negative

4. Contribution
Year Scientist
Gave us the def. of
400 BC Democritus an atom.
Billiard Ball Theory
1803 Dalton
Plum Pudding Model
1897 Thomson (Electrons)
Gold Foil (positive
1911 Rutherford Nucleus)
Modern model of
1913 Bohr the atom, small
nucleus that is
positively charged
with a negative
cloud of electrons
orbiting it.

5. Group Examples Reactivity Valence
electrons
Alkaline Li, Sr, VERY Reactive 1
Metals
Alkaline Earth Mg, Ca Not as reactive as 2
Metals group 1, but still
reactive.
Transition Hg, Ag, Au Reactivity Varies, Varies
Metals but not as reactive
as groups 1 and 2
Non-Metals C, N, O, H, Some are reactive, Varies
others aren’t
Halogens Cl, Br, I Very Reactive. As 7
reactive as group 1
Metalloids B, Si Reactivity varies 3-5
with conditions
Noble gases He, Ne, Ar Not reactive at all! 8

6. List and explain the steps of the scientific
method

7. •Write out the formula for density and complete the following
calculations: SHOW ALL WORK.
•Calculate the density of a material that has a mass of 52.457 g
and a volume of 13.5 cm3.

8. •A student finds a rock on the way to
school. In the laboratory he determines that
the volume of the rock is 22.7 cm3, and the
mass in 39.943 g. What is the density of
the rock?

9. •The density of silver is 10.49 g/cm3. If a sample of
pure silver has a volume of 12.993 cm3, what would
the mass?

10. •How many grams of tin would occupy 5.5 L, if it
has a density of 7.265 g/cm3?

11. Pure gold has a density of 19.32 g/cm3. How large
would a piece of gold be if it had a mass of 318.97 g?

12. A car is driving 70 mph down the
highway. How many m/s is this? There
are 1.6 km in a mile.

13. 3.650g =_________kg

14. 450000000mL=________kL

15. 1.3x107 cm=_________m

16. Describe the differences and
similarities between physical and
chemical properties.

17. • Glass Breaking
• Ice Melting
• Burning Wood
• Air Freshener Evaporating

18. How did Dmitri Mendeleev organize
his periodic table?

19. How did Henry Mosely organize his
periodic Table?

20. What is the difference between a
period and a group?

21. How do you calculate the number of
neutrons in an atom?

22. How many electrons, neutrons and
protons are in the following elements?
Element Protons Neutrons Electrons
Oxygen
Nitrogen
Argon
Lithium
Boron

23. Ms. Milsaps Demo Day
• Types of reactions