CHEM 120 Week 1 to Week 7 Quizzes
1. Question : (TCO 2) The atomic number of an atom is equal to the number of
Student Answer:
electrons plus protons.
nuclei.
neutrons plus protons.
protons.
neutrons.
Instructor Chapter 3; The atomic number = number of protons
Explanation:
1921547766 MultipleChoice 2 True
0 1921547766 MultipleChoice 2
2. Question : (TCO 2) Consider a neutral atom with 30 protons and 34 neutrons. The
atomic number of the element is
Student
Answer: 94.
30.
64.
32.
34.
Instructor Chapter 3; Atomic number = number of protons. Therefore, in this case, the atomic
Explanation: number = 30.
1921547767 MultipleChoice 5
0 1921547767 MultipleChoice 5
3. Question : (TCO 2) No matter how much extra oxygen is available, 12 grams of
carbon always combines with 32 grams of oxygen. This best illustrates
the law of
Student Answer:
conservation of mass.
, multiple proportions.
definite proportions.
All of the above
None of the above
Instructor Explanation: Chapter 2
MultipleChoice 8 False
1921547768 8
4. Question : (TCO 2) Which type of radioactivity has a negative charge?
Student Answer:
Alpha
Beta
Gamma
All of the above
None of the above
Instructor Explanation: Chapter 3
1921547769 MultipleChoice 11 True
0 1921547769 MultipleChoice 11
5. Question : (TCO 2) The proton has
Student Answer:
the same mass and charge as the electron.
a smaller mass and the same charge as the electron.
a smaller mass and opposite charge as the electron.
a larger mass and opposite charge as the electron.
None of the above
Instructor Explanation: Chapter 3
1921547770 MultipleChoice 18 True
1. Question : (TCO 2) The atomic number of an atom is equal to the number of
Student Answer:
electrons plus protons.
nuclei.
neutrons plus protons.
protons.
neutrons.
Instructor Chapter 3; The atomic number = number of protons
Explanation:
1921547766 MultipleChoice 2 True
0 1921547766 MultipleChoice 2
2. Question : (TCO 2) Consider a neutral atom with 30 protons and 34 neutrons. The
atomic number of the element is
Student
Answer: 94.
30.
64.
32.
34.
Instructor Chapter 3; Atomic number = number of protons. Therefore, in this case, the atomic
Explanation: number = 30.
1921547767 MultipleChoice 5
0 1921547767 MultipleChoice 5
3. Question : (TCO 2) No matter how much extra oxygen is available, 12 grams of
carbon always combines with 32 grams of oxygen. This best illustrates
the law of
Student Answer:
conservation of mass.
, multiple proportions.
definite proportions.
All of the above
None of the above
Instructor Explanation: Chapter 2
MultipleChoice 8 False
1921547768 8
4. Question : (TCO 2) Which type of radioactivity has a negative charge?
Student Answer:
Alpha
Beta
Gamma
All of the above
None of the above
Instructor Explanation: Chapter 3
1921547769 MultipleChoice 11 True
0 1921547769 MultipleChoice 11
5. Question : (TCO 2) The proton has
Student Answer:
the same mass and charge as the electron.
a smaller mass and the same charge as the electron.
a smaller mass and opposite charge as the electron.
a larger mass and opposite charge as the electron.
None of the above
Instructor Explanation: Chapter 3
1921547770 MultipleChoice 18 True
