CHEM 120 WEEK 11 PRACTICE QUESTIONS AND ANSWERS| LATEST 2021:Chamberlain College of Nursing (100% SATISFACTIONS)

1. Question No. : (TCO 2) The mass number of an atom can be calculated from

Student Ans:
the number of neutrons.

the number of protons plus neutrons.

the number of electrons plus protons.

the number of electrons.

the number of protons.
Inst. Exp: Chapter 3; Mass number = number of protons + number of electrons

1920586872 MultipleChoice 3 True

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2. Question No. : (TCO 2) Consider a neutral atom with 30 protons & 34 neutrons. The
mass number for this atom is

Student Ans:
32.

64.

34.

30.

62.
Inst. Exp: Chapter 3; Mass number = number of protons + number of neutrons = 30 + 34 = 64

1920586873 MultipleChoice 4 True

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3. Question No. : (TCO 2) Heptane is always composed of 84% carbon & 16% hydrogen.
This illustrates the law of

Student Ans:
definite proportions.

conservation of mass.

multiple proportions.

All of the above

None of the above

, Inst. Exp: Chapter 2

1920586874 MultipleChoice 9 True

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4. Question No. : (TCO 2) Which type of radioactivity has essentially no mass?

Student Ans:
Alpha

Beta

Gamma

All of the above

None of the above
Inst. Exp: Chapter 3

1920586875 MultipleChoice 13 True

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5. Question No. : (TCO 2) Essentially, all of the mass of an atom is due to the

Student Ans:
protons.

neutrons.

nucleons.

electrons.

None of the above
Inst. Exp: Chapter 3

1920586876 MultipleChoice 15 True

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6. Question No. : (TCO 2) Which subatomic particles have approximately the same
mass?

Student Ans:
Electrons & neutrons

Electrons & protons

Neutrons & protons