FHS-Physical Science
Rundell
Final Chemistry Test REVIEW
Atom Counting, Electrolysis, Ionic Bonding/Naming compounds, Reactions & Balancing
1. In a matter simulation game, two bolts, each of which have two nuts
attached are in a plastic container (see diagram). This represents a(n)
a. mixture of elements
c. mixture of compounds
b. element
d. compound
2. A “chemical formula” to represent the above scenario would be:
a. Bo2Nu4
b. 2BoNu2
c. Bo2Nu
d. 2BoNu
3. Draw a Nuts and Bolts example of: a) a mixture of elements, b) an element, c) a mixture of
compounds, d) a compound, e) a mixture of elements and compounds.
Counting Atoms
4. List how many atoms are present for each element in the compound formulas below:
a) NH3
H=
N=
b) HC2H3O2
H=
C=
O=
c) 2Al2O3
Al =
O=
d) 3Ca(OH)2
Ca =
O=
H=
e) 2Mg3(PO4)2
Mg =
P=
O=
Electrolysis (decomposition and synthesis of water):
a) Explain as much as you can about the two diagrams below. What is going on? What will
happen when each tube is flame tested? Why?
b) Describe two ways to know which test tube has hydrogen gas in an electrolysis of water
experiment.
c) Do compounds always have properties very similar to the elements of which they are made?
Explain.
d) What would happen if you lit a match in room full of pure hydrogen? Why? (discuss chemical
reaction).
e) Which substance is the most stable? Why? a) water
b) oxygen
c) hydrogen
f) Which substance below is a compound?
a) water
b) oxygen
c) hydrogen
g) What does this equation show? 2H2 + O2
2H20
h) Is the equation above balanced? Why? Is it decomposition or synthesis? What if it were
reversed?
i) In the reaction above, what are the product(s) and what are the reactant(s)?
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Reactions & Balancing
5. Define/describe the following parts of a chemical equation:
 Reactants, Products, Yields symbol
6. What is the Law of Conservation of Matter?
7. What does Conservation of Matter have to do with chemical reactions and equations?
8. Write a chemical equation which accurately describes the pictured reaction below.
H
H
H
C
OO
O C O
H
H
O O
H
OH
OH
9. Write and DRAW a balanced reaction of hydrogen (H2) and oxygen (O2) to produce H2O.
10. Which of the following is not a chemical reaction?
a)
c)
b
)
d
)
11. You will have to balance and draw three chemical equations. Practice equations on the Balancing
Bonanza, and Challenge Reactions.
12. Be able to identify a synthesis vs. a decomposition reaction.
13. Be able to identify a single vs. a double displacement reaction.
IONIC BONDING
14. What is the charge on a Boron (B) ion?
15. What is the charge on a Chlorine (Cl) ion?
16. A compound made of Boron (B) and Chlorine (Cl) would have the chemical formula…
17. The name of this compound made of Boron (B) and Chlorine (Cl) would be…
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18. Which sketch below best represents one molecule of the compound Lithium Nitride (Li3N)?
19. What is the formula for a compound made of Aluminum (Al) and Sulfur (S) ?
20. What is the best name for this compound made of Aluminum (Al) and Sulfur (S)?
21. What is the chemical formula for the compound lithium chloride?
22. Which picture below best represents Sodium Sulfate Na2(SO4)? Calcium nitrate Ca(NO3)2 ?
Sodium nitrate Na(NO3)? Calcium sulfide CaS?
a)
b)
c)
d)
e)
f)
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