Chemistry
Raymond Chang
10th edition
Chapter 2
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Question 1
The nucleus of an atom is positively
charged due to the neutrons present.
A) True
B) False
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50%
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2
Question 2
Most of the mass of an atom is contained in
the nucleus.
A) True
B) False
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50%
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2
Question 3
The atomic number of an neutral atom is
the same as the number of protons or
electrons.
A) True
B) False
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50%
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2
Question 4
Which of the following combinations of
protons (p), neutrons (n), and electrons
(e), respectively, is possible for a neutral
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carbon atom?
A) 6p, 5n, 7e
B) 12p, 6n, 6e
C) 6p, 7n, 6e
D) 6p, 7n, 7e
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Question 5
Which of the following combinations of
protons (p), neutrons (n), and electrons (e),
respectively, is possible for a chloride ion?
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3
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A) 17p, 18n, 17e
B) 17p, 20n, 18e
C) 16p, 19n, 17e
D) All are possible
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Question 6
Which of the following list a metal, a
nonmetal, and a noble gas, respectively?
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3
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A) Au, P, Ne
B) Ne, Ar, Cl
C) Au, Pt, He
D) Au, P, H
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Question 7
What is the empirical formula of a
compound that contains molecules
composed of 3 carbon atoms and 6
hydrogen atoms? 25% 25% 25% 25%
A) CH2
B) C2H4
C) C3H6
D) All of the above
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Question 8
The compound dinitrogen monoxide could
be classified as
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A) a molecular compound.
B) an ionic compound.
C) a binary compound.
D) A or C.
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Question 9
Which of the following chemical names
could refer to more than one common
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compound?
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A) calcium hydroxide
B) copper chloride
C) sodium sulfide
D) lithium nitrate
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Question 10
Which of the following formulas refers to the
sulfate ion?
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3
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A) SO42B) SO4
C) SO32D) SO3
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Question 11
The law of definite proportions was
published by
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3
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A) Dalton.
B) Proust.
C) Einstein.
D) Thomson.
E) Millikan.
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5
Question 12
Which of the following is not an elementary
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subatomic particle?
1.
2.
3.
4.
5.
A) Neutron
B) Proton
C) Electron
D) a particle
E) b particle
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5
Which of the following statements is false ?
A) A neutron is about 1840
times heavier than an
electron
B) An electron is about
1840 times lighter than a
proton
C) A proton has the same
charge magnitude as an
electron
D) A neutron has about the
same mass as a proton
E) All the charge of an
atom is concentrated in its
nucleus
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1
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2
3
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4
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5
Question 14
Which is the appropriate symbol for an
isotope with Z = 75 and A = 187?
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3
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A) 75 Re
75
Re
B) 187
C) 187
75 Re
D) 112
75 Re
E) 187
75 W
262
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Question 15
Which of the following is not the
common name of a group of elements in
the Periodic Table? 20% 20% 20% 20% 20%
A) alkali metals
B) transition metals
C) halogens
D) inert gases
E) alkali earth metals
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Question 16
The species Hg22+ is an example of
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3
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A) a monoatomic cation.
B) a polyatomic cation.
C) a monoatomic anion.
D) a polyatomic anion.
E) a polyatomic metal.
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Question 17
What is the name of Cr2(Cr2O7)3?
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3
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A) chromium (II) dichromate
B) chromium (II) trichromate
C) chromium (III) heptoxide
D) chromium (III) heptaoxide
E) chromium (III) dichromate
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Question 18
Which of the following represents the salt
cobaltic thiocyanate? 20% 20% 20% 20% 20%
A) Co(CN)2
B) Co(SCN)2
C) Co(CN)3
D) Co(SCN)3
E) none of the above
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Question 19
Which of the following formulas does not
represent a real compound?
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1.
2.
3.
4.
5.
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3
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A) CuOH
B) MnO2
C) Al2(HPO4)3
D) (NH4)2Cr2O7
E) NaCO3
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Question 20
Which of the following is most similar in
properties to cupric sulfate?
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3
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A) CuSO3
B) Cu2SO3
C) Cu2SO4
D) CuSO4 • 5 H2O
E) CuS
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Answer Key – Chapter 2
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
B
A
A
C
B
A
A
D
B
A
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
B
D
E
C
B
B
E
D
E
D