Nuclear Physics Multiple Choice Questions and Answers

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