Question 1

Which of the following statements best describes the difference between nuclear fission and nuclear fusion?

Accepted Answer

Nuclear fission splits a heavy nucleus into lighter nuclei, while nuclear fusion combines two light nuclei to form a heavier nucleus.

Question 2

Which type of radiation consists of a particle with a mass number of 4 and an atomic number of 2?

Accepted Answer

Alpha radiation

Question 3

A radioactive isotope has a half-life of 10 years. If you start with 80 grams, how much will remain after 30 years? Use the half-life formula: $$N = N_0$ \left( \frac{1}{2} \$$right)^{t/t_{1/2}$$}$$

Accepted Answer

10 grams

Question 4

Which of the following is a common unit used to measure radiation dose absorbed by human tissue?

Accepted Answer

Gray (Gy)

Question 5

Which of the following nuclear equations correctly represents beta decay of $$^{14}_{6}\mathrm{C}$$?

Accepted Answer

$$^{14}_{6}\mathrm{C} \$$rightarrow ^{14}$$_{7}\mathrm{N} $$+ ^{0}$$_{-1}\beta$$

Question 6

Which of the following is a primary use of radioisotopes in nuclear medicine?

Accepted Answer

To diagnose and treat diseases by tracing or targeting specific tissues

Question 7

Which of the following statements about gamma radiation is correct?

Accepted Answer

Gamma radiation is electromagnetic radiation with no mass or charge.

Question 8

A sample of $$^{60}\mathrm{Co}$$ has an activity of 8.0 mCi. How many microcuries ($$\muCi) is $$this? (1 mCi = 1000 $$\muCi)$$

Accepted Answer

8000 $$\muCi$$

Question 9

Which of the following is a health effect of high exposure to ionizing radiation?

Accepted Answer

Increased risk of cancer

Question 10

Which isotope is commonly used for radiometric dating of ancient organic materials?

Accepted Answer

$$^{14}\mathrm{C}$$

Question 11

Which of the following best describes a positron?

Accepted Answer

A particle with the same mass as an electron but a positive charge

Question 12

A patient receives a dose of 0.5 Gy of radiation. If the biological effectiveness factor (RBE) is 2, what is the equivalent dose in sieverts (Sv)? Use the formula: $$	ext{Equivalent dose (Sv)} = 	ext{Absorbed dose (Gy)} 	imes 	ext{RBE}$$

Accepted Answer

1.0 Sv

Question 13

Which of the following is NOT a requirement for radiometric dating to determine the age of an object?

Accepted Answer

The object must be made entirely of radioactive material.

Question 14

Which of the following nuclear reactions represents positron emission from $$^{22}_{11}\mathrm{Na}$$?

Accepted Answer

$$^{22}_{11}\mathrm{Na} \$$rightarrow ^{22}$$_{10}\mathrm{Ne} $$+ ^{0}$$_{+1}e$$

Question 15

Which of the following best describes a chain reaction in nuclear fission?

Accepted Answer

A process where one fission event causes further fission events, releasing more neutrons and energy.

Question 16

Which of the following is a benefit of nuclear medicine?

Accepted Answer

It allows for non-invasive imaging and targeted treatment of diseases.

Question 17

Which of the following statements about alpha particles is correct?

Accepted Answer

Alpha particles are identical to helium nuclei.

Question 18

A radioactive sample decays from 100 mg to 25 mg in 12 hours. What is the half-life of the isotope? Use the half-life formula: $$N = N_0$ \left( \frac{1}{2} \$$right)^{t/t_{1/2}$$}$$

Accepted Answer

6 hours

Question 19

Which of the following is a correct statement about the two general classes of radiation health effects?

Accepted Answer

They are deterministic effects and stochastic effects.

Chapter 5: Nuclear Chemistry – Study Guide and Key Concepts

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