Unit 7 Test
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____
1. The electronegativity of an element is defined as:
a. the attraction an atom has for the shared pair of electrons in a covalent bond.
b. the attraction an atom has for the shared pair of electrons in an ionic bond.
c. the amount of static electricity an element produces.
d. the amount of charge one atom of an element produces.
____
2. An atom contains ____ in various energy levels.
a. neutrons
b. protons
c. electrons
d. ions
____
3. Sodium forms an ionic bond with chlorine when sodium ____ an electron and chlorine ____ an electron.
a. shares, shares
b. loses, gains
c. gains, loses
d. loses, loses
Use the diagram of the periodic table below to answer the following questions.
The Periodic Table of the Elements
1
1
2
18
1
2
H
He
Hydrogen
1.0
2
3
4
13
6
7
8
9
10
N
O
F
Ne
Lithium
6.9
Beryllium
9.0
Boron
10.8
Carbon
12.0
Nitrogen
14.0
Oxygen
16.0
Fluorine
19.0
Neon
20.2
11
12
13
14
15
16
17
18
Al
Si
P
S
Sodium
23.0
Magnesium
24.3
3
4
19
20
21
22
5
23
V
Cl Ar
6
7
8
9
10
11
12
Aluminum
27.0
Silicon
28.1
Phosphorus
31.0
Sulfur
32.1
Chlorine
35.5
Argon
39.9
24
25
26
27
28
29
30
31
32
33
34
35
36
Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Potassium
39.1
Calcium
40.1
Scandium
45.0
Titanium
47.9
Vanadium
50.9
Chromium
52.0
Manganese
54.9
Iron
55.8
Cobalt
58.9
Nickel
58.7
Copper
63.5
Zinc
65.4
Gallium
69.7
Germanium
72.6
Arsenic
74.9
Selenium
79.0
Bromine
79.9
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
I
Xe
Y
Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te
Rubidium
85.5
Strontium
87.6
Yttrium
88.9
Zirconium
91.2
Niobium
92.9
Molybdenum
95.9
55
56
57
72
73
74
Technetium Ruthenium
(97.9)
101.1
75
76
Rhodium
102.9
77
Silver
107.9
Cadmium
112.4
Indium
114.8
Tin
118.7
Antimony
121.8
Tellurium
127.6
Iodine
126.9
Xenon
131.3
78
79
80
81
82
83
84
85
86
Pt Au Hg Tl Pb Bi Po At Rn
Cesium
132.9
Barium
137.3
Lanthanum
138.9
Hafnium
178.5
Tantalum
180.9
Tungsten
183.8
Rhenium
186.2
Osmium
190.2
Iridium
192.2
Platinum
195.1
Gold
197.0
Mercury
200.6
87
88
89
104
105
106
107
108
109
110
111
112
Francium
(223.0)
Radium
(226.0)
Actinium
(227.0)
Rutherfordium
(261.1)
Dubnium
(262.1)
Seaborgium
(263.1)
Bohrium
(262.1)
Hassium
(265)
58
59
60
61
Meitnerium Ununnilium Unununium
(266)
(271)
(272)
62
Krypton
83.8
Palladium
106.4
Thallium
204.4
Fr Ra Ac Rf Db Sg Bh Hs Mt Uun Uuu Uub
7
Helium
4.0
C
Cs Ba La Hf Ta W Re Os Ir
6
17
5
Rb Sr
5
16
B
K Ca Sc Ti
4
15
Li Be
Na Mg
3
14
63
Ununbium
(277)
64
65
66
Lead
207.2
Bismuth
209.0
Polonium
(209.0)
Astatine
(210.0)
Radon
(222.0)
114
116
118
Uuq
Uuh
Uuo
Ununquadium
(285)
Ununhexium
(289)
Ununoctium
(293)
67
68
69
70
71
Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Cerium
140.1
90
Praseodymium Neodymium
140.9
144.2
91
Th Pa
Thorium
232.0
Protactinium
231.0
92
Promethium
(144.9)
Samarium
150.4
Europium
152.0
Gadolinium
157.3
Terbium
158.9
Dysprosium
162.5
Holmium
164.9
Erbium
167.3
Thulium
168.9
Ytterbium
173.0
Lutetium
175.0
93
94
95
96
97
98
99
100
101
102
103
U Np Pu Am Cm Bk Cf Es Fm Md No Lr
Uranium
238.0
Neptunium
(237.0)
Plutonium
244.1
Americium
(243.1)
Curium
(247.1)
Berkelium
(247.1)
Californium Einsteinium
(251.1)
(252.1)
Fermium
(257.1)
Mendelevium
(258.1)
____
4. Elements in group 1 would LEAST likely bond with elements from which group?
a. Group 2
b. Group 16
c. Group 17
d. None of the above.
____
5. Which statement is NOT TRUE about elements in group 16?
a. They need two electrons to complete their octet.
b. They have an oxidation number of 2-.
c. They have an oxidation number of 2+.
d. They have six valence electrons.
____
6. Which of the following is TRUE? Covalent bonding occurs:
a. in salts like NaCl.
b. when electrons are shared between two atoms.
c. only when electrons are shared between two identical atoms.
d. when electrons are transferred from one atom to another.
Nobelium
(259.1)
Lawrencium
(262.1)
____
7. What is the chemical formula for a compound that contains the aluminum ion (Al3+) and the hydroxide ion
(OH-)?
a. Al(OH)3
b. AlO3H3
c. AlOH3
d. None of the above
____
8. The compound CaCl2 contains which of the following ions?
a. Ca+ and Clb. Ca2+ and Clc. Ca4+ and Cl2d. Ca2+ and Cl4-
____
9. In the periodic table notation below, what information does the number 40.08 tell you?
a.
b.
c.
d.
It is the number of protons.
It is the number of neutrons.
It is the atomic number.
It is the atomic mass.
____ 10. Avogadro's number is equal to:
a. One mole of a substance.
b. 6.02 x 1023 molecules.
c. the number of atoms in the atomic mass of an element, when the mass is expressed in
grams.
d. all of the above.
____ 11. The molecular formula for aspirin is: C9H8O4. What is its empirical formula?
a. C9H8O4
b. C3H2O2
c. CHO
d. None of the above.
____ 12. When you eat an apple, the process of digestion involves:
a. physical change only.
b. chemical change only.
c. physical and chemical change.
d. phase change.
____ 13. In which of the following situations does water undergo a change in physical properties?
a. The bathroom fills with steam when you take a hot shower.
b. The neighbor's pond freezes over in winter.
c. Water is broken down to yield H2 and O2.
d. (a) and (b) only.
____ 14. Balance the following equation to demonstrate the conservation of atoms in a reaction. Choose the answer
which provides the correct coefficients for each reactant and product.
_____ Fe + _____ O2
_____ Fe2O3
a. (4, 3, 2)
b. (2, 1, 1)
c. (1, 2, 3)
d. (2, 3, 1)
____ 15. The principle of conservation of atoms is satisfied in a chemical equation when:
a. all of the atoms involved in the equation have an oxidation number of 1+.
b. the reactant side has the same number of each type of atom as the product side.
c. the sum of the coefficients on the reactant side is the same as the sum of the coefficients
on the product side.
d. each atom on the product side has the same subscript that it had on the reactant side.
____ 16. If you designed your own experiment to prove the law of conservation of mass, what conditions would be
required?
a. You must find the mass of the reactants before the reaction and find the mass of the
products after the reaction.
b. You must find the mass of the reactants before the reaction, find the mass of the products
after the reaction, AND perform the reaction in a closed system.
c. You must choose a combustion reaction.
d. You must use mercury because the law applies only to mercury.
____ 17. Classify the following reaction:
3CuSO4 + 2Al
a. Addition
b. Single-displacement
c. Double-displacement
d. Decomposition
Al2(SO4)3 + 3Cu
____ 18. Classify the following reaction:
Cu(NO3)2 + 2NaOH
a. Addition
b. Single-displacement
c. Double-displacement
d. Decomposition
Cu(OH)2 + 2NaNO3
____ 19. Classify the following reaction:
Cu(OH)2
CuO + H2O
a. Addition
b. Single-displacement
c. Double-displacement
d. Decomposition
A chemist is given the job of recovering silver ions, Ag+, from a solution before the solution is discarded. She
is given the job because silver is expensive and may be reused.
Answer the following questions about the chemist's task.
____ 20. Based on your choice of reactants, what kind of reaction would the chemist use to extract the silver?
a. Addition
b. Double-replacement
c. Decomposition
d. Single-replacement
____ 21. In addition to the silver ions, what other product is formed by the reaction?
a. CuAg
b. AgCl
c. NO3d. CuNO3
____ 22. Atoms of a particular element that have different numbers of neutrons are called:
a. isotopes.
b. isotoners.
c. isometrics.
d. isomers.
____ 23. The atomic mass number for the radioisotope carbon-13 is:
a. 6
b. 7
c. 12
d. 13
____ 24. What kind of reaction do nuclear power plants currently use to generate electricity?
a. Fusion reactions
b. Fission reactions
c. Chemical reactions
d. Hydro-powered reactions
____ 25. An amount of sodium-25 decreases to one-fourth its original amount in 2 minutes. What is the half-life of this
radioisotope?
a. Four minutes
b. Two minutes
c. One minute
d. Thirty seconds
Unit 7 Test
Answer Section
MULTIPLE CHOICE
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.
A
C
B
A
C
B
A
B
D
D
A
C
D
A
B
B
B
C
D
D
D
A
D
B
C