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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 $16.49
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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
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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

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  • November 10, 2024
  • 686
  • 2024/2025
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Test Bank For r r r


Chemistry An r r r


Atoms First r r r


Approach, 3rd
r r r


Edition Steven S.
r r r r


r Zumdahl (Author), r r


Susan A. Zumdahl
r r r r


r (Author), Donald J. r r r


DeCoste (Author)
r r r


Chapter 1-21 r r

,Chapter1 -Chemical Foundations
r r r r




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


contains:
r


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



b. 49 protons, 49 neutrons. r r r



c. 49 protons, 49 alpha particles. r r r r



d. 49 protons, 63 neutrons. r r r



e. 49 protons, 112 neutrons. r r r



ANSWER: d
POINTS: 1

2. Ahypothetical element consists oftwo isotopes ofmasses 78.95 amu and 80.95 amu with abundances of
r r r r r r r r r r r r r r r r


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


a. 79.95 amu r


b. 78.95 amu r


c. 79.6 amu r


d. 80.3 amu r


e. 80.95 amu r


ANSWER: d
POINTS: 1

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


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


a. 28.09 amu r


b. 48.63 amu r


c. 27.16 amu r


d. 28.97 amu r


e. 86.93 amu r


ANSWER: a
POINTS: 1

4. The atomic mass of rhenium is 186.2. Given that 37.1% ofnatural rheniumis rhenium-185, what is the other
r r r r r r r r r r r r r r r r r r


stable isotope?
r r


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
r r r r r r r r r r r r r r




Copyright rCengage rLearning. rPowered rby rCognero. Page r1

,Chapter1 -Chemical Foundations
r r r r




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


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?
r r r r r r r r r r


a. 381.3 g r


b. 1.58 × 1021 g r r
r



c. 6.38 × 10–24 g r r
r



d. 6.022 × 1023 g r r
r



e. 6.33 × 10–22g r r



ANSWER: e
POINTS: 1

7. Youhave a sample of zinc (Zn) and a sample of aluminum (Al). Youhave an equal number ofatoms in each
r r r r r r r r r r r r r r r r r r r r r


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


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


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


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


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


e. Themasses of each sample are equal.
r r r r r r


ANSWER: a
POINTS: 1

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



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



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



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



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



ANSWER: a
POINTS: 1

9. Whichofthe following statements is (are) true? a.
r r r r r r r r

and haverthersamernumber rof rneutrons.
b.
and are risotopesrof reach rother rbecause rtheir rmassrnumbers rarerthe rsame.




Copyright rCengage rLearning. rPowered rby rCognero. Page r2

, Chapter1 -Chemical Foundations
r r r r




c.
hasrthe rsame rnumber rof relectrons ras .
d. A randrB
e. A rand rC
ANSWER: e
POINTS: 1

10. Aspecies with 12 protons and 10 electrons is
r r r r r r r r .
a. Ne2+

b. Ti2+

c. Mg2+

d. Mg
e. Ne2–

ANSWER: c
POINTS: 1


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


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



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



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



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



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



ANSWER: e
POINTS: 1

12. An ion is formed:
r r r


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



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



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



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



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



ANSWER: b
POINTS: 1

13. All ofthe following aretrue except:
r r r r r r


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




Copyright rCengage rLearning. rPowered rby rCognero. Page r3

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