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Name: ________________________ Class: ___________________ Date: __________
ID: A
Chapter 4: Atomic Structure Retake 2013
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century
ago?
A. Compounds are made by combining atoms. B. Atoms of different elements can combine with one
another in simple whole number ratios. C. Atoms are tiny indivisible particles. D. Atoms of the same
element are identical.
____
2. Which of the following is true about subatomic particles?
A. Protons are positively charged and the lightest subatomic particle. B. Neutrons have no charge and are
the lightest subatomic particle. C. The mass of a neutron nearly equals the mass of a proton. D. Electrons
are negatively charged and are the heaviest subatomic particle.
____
3. The gold foil experiment performed in Rutherford's lab __________.
A. was the basis for Thomson's model of the atom B. proved the law of multiple proportions
C. confirmed the plum-pudding model of the atom D. led to the discovery of the atomic nucleus
E. utilized the deflection of beta particles by gold foil
____
4. There are __________ protons, __________ neutrons, and __________ electrons in 131I-.
A. 78, 53, and 72 B. 131, 53, and 52 C. 53, 131, and 52 D. 131, 53, and 54 E. 53, 78, and 54
____
5. The sum of the protons and neutrons in an atom equals the ____.
A. atomic mass B. mass number C. atomic number D. nucleus number
____
6. The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes
are given in the table below. The average atomic mass of the element is __________ amu.
A. 218.5 B. 220.42 C. 220.4 D. 219.7
____
7. Because a few alpha particles bounced back from the foil, Rutherford concluded that they were
A. magnetic. B. striking electrons. C. indivisible. D. repelled by densely packed regions of positive
charge.
____
8. Isotopes of the same element have different ____.
A. positions on the periodic table B. chemical behavior C. mass numbers D. atomic numbers
____
9. Cathode rays are deflected away from a negatively charged plate because __________.
A. they are emitted by all matter B. they are neutral particles C. they are negatively charged particles
D. they are positively charged particles E. they are not particles
____ 10. Chlorine has atomic number 17 and mass number 35. It has
A. 17 protons, 17 electrons, and 52 neutrons. B. 17 protons, 17 electrons, and 18 neutrons. C. 18
protons, 18 electrons, and 17 neutrons. D. 35 protons, 35 electrons, and 17 neutrons.
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Name: ________________________
ID: A
____ 11. The element X has two naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are
given in the table below. The average atomic mass of the element is __________ amu.
A. 34.02 B. 35.22 C. 30.20 D. 33.20 E. 32.73
____ 12. Who was the man who lived from 460B.C.–370B.C. and was among the first to suggest the idea of atoms?
A. Thomson B. Democritus C. Atomos D. Dalton
____ 13. Phosphorus-33 (atomic number 15) contains
A. 18 protons. B. 18 neutrons. C. 33 protons. D. 33 neutrons.
____ 14. Who conducted experiments to determine the quantity of charge carried by an electron?
A. Thomson B. Millikan C. Dalton D. Rutherford
____ 15. Which isotope has 45 neutrons?
A. 34 Cl B. 80 Br C. 78 Se D. 80 Kr E. 103 Rh
17
35
34
36
45
____ 16. An atom has 23 protons and 29 neutrons. Which is the correct chemical symbol for this atom?
V C. 52
Cu D. 52
V
A. 296 C B. 29
23
23
23
____ 17. The atomic number indicates __________.
A. the number of different isotopes of an element B. the number of atoms in 1 g of an element C. the
number of neutrons in a nucleus D. the number of protons or electrons in a neutral atom E. the total
number of neutrons and protons in a nucleus
____ 18. Which of the following is correct concerning subatomic particles?
A. The electron was discovered by Goldstein in 1886. B. The neutron was discovered by Chadwick in
1932. C. Cathode rays were found to be made of protons. D. The proton was discovered by Thomson in
1880.
____ 19. Which of the following sets of symbols represents isotopes of the same element?
92
A. 84
M 86
M 87
M B. 50
L 50
L 50
L C. 138
Q 133
Q 133
Q D. 91
J
J
38
38
38
19
20
21
59
55
54
42
42
93
40
J
____ 20. Which of the following equals one atomic mass unit?
A. the mass of one helium-4 atom B. the mass of one carbon-12 atom C. the mass of one electron
D. one-twelfth the mass of one carbon-12 atom
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ID: A
Chapter 4: Atomic Structure Retake 2013
Answer Section
MULTIPLE CHOICE
1. ANS:
OBJ:
2. ANS:
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16. ANS:
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20. ANS:
OBJ:
C
PTS: 1
DIF: L2
REF: p. 104
4.1.2 Explain Dalton's atomic theory.
C
PTS: 1
DIF: L2
REF: p. 104 | p. 105 | p. 106
4.2.1 Identify three types of subatomic particle.
D
PTS: 1
DIF: 1
REF: Sec. 2.2
E
PTS: 1
DIF: 2
REF: Sec. 2.7
B
PTS: 1
DIF: L1
REF: p. 111
4.3.1 Explain what makes elements and isotopes different from each other.
C
PTS: 1
D
PTS: 1
DIF: I
REF: 2
2
C
PTS: 1
DIF: L1
REF: p. 112 | p. 113
4.3.1 Explain what makes elements and isotopes different from each other.
C
PTS: 1
DIF: 1
REF: Sec. 2.2
B
PTS: 1
DIF: III
REF: 3
3
D
PTS: 1
DIF: 1
REF: Sec. 2.4
B
PTS: 1
DIF: L2
REF: p. 101
4.1.1 Describe Democritus's ideas about atoms.
B
PTS: 1
DIF: III
REF: 3
3
B
PTS: 1
DIF: L2
REF: p. 105
4.2.1 Identify three types of subatomic particle.
B
PTS: 1
DIF: 1
REF: Sec. 2.3
D
PTS: 1
DIF: Bloom's Level 3
UCP.2 | B.1
D
PTS: 1
DIF: 1
REF: Sec. 2.3
B
PTS: 1
DIF: L3
REF: p. 105 | p. 106
4.2.1 Identify three types of subatomic particle.
A
PTS: 1
DIF: L3
REF: p. 112 | p. 113
4.3.1 Explain what makes elements and isotopes different from each other.
D
PTS: 1
DIF: L1
REF: p. 114
4.3.3 Calculate the atomic mass of an element.
1