Nuclear Physics MCQ Questions and Answers for Practice

1. A reaction that releases more energy than is put into it is called:

1. endothermic
2. exothermic
3. nuclear
4. chemical

2. An isotope with a high Binding Energy per nucleon:

1. will decay in a short period of time.
2. is very unstable.
3. is very stable .
4. has very few electrons.

3. An unknown chemical element is presented by the following formula: ^AX_Z. What is the name of index A?

1. Atomic mass number
2. Atomic number
3. Principle quantum number
4. Orbital quantum number

4. An unknown chemical element is presented by the following formula: ^AX_Z. What is the name of index Z?

1. Atomic mass number
2. Atomic number
3. Principle quantum number
4. Orbital quantum number

5. A 100 g sample of a radioactive element has a half-life of 5 days. How many grams of radioactive material will remain after 15 days?

1. 100 g
2. 50 g
3. 25 g
4. 12.5 g

6. Binding energy is:

1. the amount of energy required to break a nucleus apart into protons and neutrons.
2. the amount of energy required to break a nucleus apart into protons and electrons.
3. the amount of energy required to break a nucleus apart into electrons and neutrons.
4. the amount of energy released when neutrons change energy levels.

7. How many electrons are in the ⁶C₁₂ atom?

1. 12
2. 6
3. 18
4. 3

8. How many neutrons are in the ²³Na₁₁ atom?

1. 12
2. 11
3. 18
4. 24

9. How many nucleons are in the ²⁰Ne₁₀ atom?

1. 12
2. 30
3. 18
4. 20

10. How many protons are in the ¹⁴N₇ atom?

1. 14
2. 6
3. 7
4. 10

11. Isotopes of an element:

1. have the same number of protons and electrons, but a different number of neutrons.
2. have the same number of protons and neutrons, but a different number of electrons.
3. have different number of protons.
4. have different number of electrons.

12. The atomic mass number is equivalent to which of the following?

1. The number of neutrons in the atom.
2. The number of protons in the atom.
3. The number of nucleons in the atom
4. The number of alpha-particles in the atom.

13. The atomic number is equivalent to which of the following?

1. The number of neutrons in the atom.
2. The number of protons in the atom.
3. The number of nucleons in the atom.
4. The number of alpha-particles in the atom.

14. The following reaction: ¹n₊₀ + ²³⁵U₉₂ -> ¹⁴¹Ba₅₆ + ⁹²Kr₃₆ + 3¹n₀ is called:

1. Fusion
2. Fission
3. alpha decay
4. beta decay

15. The following reaction: ²H₁ + ³H₊₁ -> ⁴He₂ + ¹n₀ is called:

1. Fusion
2. Fission
3. alpha decay
4. beta decay