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Test Bank For Chemistry An Atoms First Approach, 3rd Edition Steven S. Zumdahl (Author), Susan A. Zumdahl (Author), Donald J. DeCoste (Author) Chapter 1-21 ||Complete A+ Guide $17.99
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Test Bank For Chemistry An Atoms First Approach, 3rd Edition Steven S. Zumdahl (Author), Susan A. Zumdahl (Author), Donald J. DeCoste (Author) Chapter 1-21 ||Complete A+ Guide

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Test Bank For
Chemistry An
Atoms First
Approach, 3rd
Edition Steven S.
Zumdahl (Author),
Susan A. Zumdahl
(Author), Donald J.
DeCoste (Author)
Chapter 1-21

,Chapter 1 - Chemical Foundations
f f f f




1. Consider the element indium, atomic number 49, atomic mass 114.8 g. The nucleus of an atom of indium-112
f f f f f f f f f f f f f f f f f


contains:
f


a. 49 protons, 63 neutrons, 49 electrons.
f f f f f



b. 49 protons, 49 neutrons. f f f



c. 49 protons, 49 alpha particles. f f f f



d. 49 protons, 63 neutrons. f f f



e. 49 protons, 112 neutrons. f f f



ANSWER: d
POINTS: 1

2. A hypothetical element consists of two isotopes of masses 78.95 amu and 80.95 amu with abundances of
f f f f f f f f f f f f f f f f


32.9% and 67.1%, respectively. What is the average atomic mass of this element?
f f f f f f f f f f f f f


a. 79.95 amu f



b. 78.95 amu f



c. 79.6 amu f



d. 80.3 amu f



e. 80.95 amu f



ANSWER: d
POINTS: 1

3. Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.23% abundance), X-29
f f f f f f f f f f f f f f


(28.976 amu, 4.67% abundance), and X-30 (29.974 amu, 3.10% abundance). Calculate the atomic weight of X.
f f f f f f f f f f f f f f f f


a. 28.09 amu f



b. 48.63 amu f



c. 27.16 amu f



d. 28.97 amu f



e. 86.93 amu f



ANSWER: a
POINTS: 1

4. The atomic mass of rhenium is 186.2. Given that 37.1% of natural rhenium is rhenium-185, what is the other
f f f f f f f f f f f f f f f f f f


stable isotope?
f f


a.
b.
c.
d.
e.
ANSWER: b
POINTS: 1

5. Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.23% abundance), X-29
f f f f f f f f f f f f f f




Copyright fCengage fLearning. fPowered fby fCognero. Page f1

,Chapter 1 - Chemical Foundations
f f f f




(28.976 amu, 4.67% abundance), and X-30 (29.974 amu, 3.10% abundance). What is the identity of element X?
f f f f f f f f f f f f f f f f


a. Cu
b. Al
c. Ni
d. Si
e. Sr
ANSWER: d
POINTS: 1

6. What is the mass of 6 atom(s) of copper in grams?
f f f f f f f f f f


a. 381.3 g f f



b. 1.58 × 1021 g f f f



c. 6.38 × 10–24 g f f f



d. 6.022 × 1023 g f f f



e. 6.33 × 10–22g f f



ANSWER: e
POINTS: 1

7. You have a sample of zinc (Zn) and a sample of aluminum (Al). You have an equal number of atoms in each
f f f f f f f f f f f f f f f f f f f f f


sample. Which of the following statements concerning the masses of the samples is true?
f f f f f f f f f f f f f f


a. The mass of the zinc sample is more than twice as great as the mass of the aluminum sample.
f f f f f f f f f f f f f f f f f f



b. The mass of the zinc sample is more than the mass of the aluminum sample, but it is not twice as great.
f f f f f f f f f f f f f f f f f f f f f



c. The mass of the aluminum sample is more than twice as great as the mass of the zinc sample.
f f f f f f f f f f f f f f f f f f



d. The mass of the aluminum sample is more than the mass of the zinc sample, but it is not twice as great.
f f f f f f f f f f f f f f f f f f f f f



e. The masses of each sample are equal.
f f f f f f



ANSWER: a
POINTS: 1

8. has .
a. 20 protons, 20 neutrons, and 18 electrons
f f f f f f



b. 22 protons, 20 neutrons, and 20 electrons
f f f f f f



c. 20 protons, 22 neutrons, and 18 electrons
f f f f f f



d. 22 protons, 18 neutrons, and 18 electrons
f f f f f f



e. 20 protons, 20 neutrons, and 22 electrons
f f f f f f



ANSWER: a
POINTS: 1

9. Which of the following statements is (are) true?
f f f f f f f


a. f

and have the same number of neutrons.
f f f f f


b.
and are isotopes of each other because their mass numbers are the same.
f f f f f f f f f f f




Copyright fCengage fLearning. fPowered fby fCognero. Page f2

, Chapter 1 - Chemical Foundations
f f f f




c.
has the same number of electrons as f f f f f f .
d. f A and B
f f



e. A and C f f f



ANSWER: e
POINTS: 1

10. A species with 12 protons and 10 electrons is
f f f f f f f f .
a. Ne2+

b. Ti2+

c. Mg2+

d. Mg
e. Ne2–

ANSWER: c
POINTS: 1


11. The numbers of protons, neutrons, and electrons in
f f f f f f f K+ are: f



a. 20 p, 19 n, 19 e. f f f f f f



b. 20 p, 19 n, 20 e. f f f f f



c. 19 p, 20 n, 20 e. f f f f f



d. 19 p, 20 n, 19 e. f f f f f



e. 19 p, 20 n, 18 e. f f f f f



ANSWER: e
POINTS: 1

12. An ion is formed:
f f f


a. by either adding or subtracting protons from the atom.
f f f f f f f f



b. by either adding or subtracting electrons from the atom
f f f f f f f f



c. by either adding or subtracting neutrons from the atom.
f f f f f f f f



d. all of the above are true. f f f f f



e. two of the above are true. f f f f f



ANSWER: b
POINTS: 1

13. All of the following are true except:
f f f f f f


a. ions are formed by adding electrons to a neutral atom.
f f f f f f f f f




Copyright fCengage fLearning. fPowered fby fCognero. Page f3

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