Question 1

Which of the following statements best describes the difference between chemical and nuclear reactions?

Accepted Answer

In nuclear reactions, elements often change their identity due to changes in the number of protons, while in chemical reactions, elements retain their identity.

Question 2

Which type of radiation has the highest ionizing power but the lowest penetrating power?

Accepted Answer

Alpha (α) radiation

Question 3

Which nuclear equation correctly represents the alpha decay of uranium-238?

Accepted Answer

$$ ^{238}_{92}\mathrm{U} \$$rightarrow ^{234}$$_{90}\mathrm{Th} $$+ ^{4}$$_{2}\mathrm{He} $$

Question 4

A radioactive isotope has a half-life of 10 years. If you start with 80 grams, how much will remain after 30 years?

Accepted Answer

10 grams

Question 5

Which device is commonly used for instantaneous detection of radioactivity by measuring ionization of argon gas?

Accepted Answer

Geiger-Müller counter

Question 6

Which of the following best explains why radon gas is a significant health risk in homes built over uranium-rich soil?

Accepted Answer

Radon is a radioactive gas that can be inhaled, and its decay products can damage lung tissue, increasing cancer risk.

Question 7

Which of the following nuclear equations represents positron emission from phosphorus-30?

Accepted Answer

$$ ^{30}_{15}\mathrm{P} \$$rightarrow ^{30}$$_{14}\mathrm{Si} $$+ ^{0}$$_{1}\mathrm{e} $$

Question 8

A sample of carbon-14 has 12.5% of its original radioactivity remaining. Given the half-life of carbon-14 is 5730 years, estimate the age of the sample.

Accepted Answer

17,190 years

Question 9

Which of the following statements about gamma (γ) radiation is correct?

Accepted Answer

Gamma rays are high-energy photons with low ionizing power and high penetrating power.

Question 10

Which of the following is a correct balanced nuclear equation for the beta decay of radium-228?

Accepted Answer

$$ ^{228}_{88}\mathrm{Ra} \$$rightarrow ^{228}$$_{89}\mathrm{Ac} $$+ ^{0}$$_{-1}\mathrm{e} $$

Question 11

Which of the following best describes the process of nuclear fission as used in power plants?

Accepted Answer

Splitting a heavy nucleus into smaller nuclei, releasing energy and neutrons that can induce further fission.

Question 12

Which of the following is a real-world application of radioisotopes in medicine?

Accepted Answer

Using iodine-131 to diagnose thyroid disorders.

Question 13

Which of the following statements about the half-life of a radioactive nuclide is correct?

Accepted Answer

The half-life is the time it takes for half of the parent nuclides in a sample to decay.

Question 14

Which of the following best explains why control rods are used in nuclear reactors?

Accepted Answer

They absorb neutrons to regulate or stop the fission chain reaction.

Question 15

Which of the following is a possible effect of acute radiation exposure?

Accepted Answer

Weakened immune system and decreased ability to absorb nutrients.

Question 16

Which of the following best describes the process of radiocarbon dating?

Accepted Answer

Measuring the amount of carbon-14 remaining in an artifact to estimate its age based on the known half-life of carbon-14.

Question 17

Which of the following is true about the products of nuclear fission in a power plant?

Accepted Answer

They are often radioactive and require long-term storage due to their long half-lives.

Question 18

Which of the following best explains why fusion is not yet a practical source of electricity?

Accepted Answer

Fusion reactions require extremely high temperatures that current building materials cannot withstand.

Question 19

Which of the following is the correct symbol for a beta particle in a nuclear equation?

Accepted Answer

$$ ^{0}_{-1}\mathrm{e} $$

Chapter 17: Radioactivity and Nuclear Chemistry – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards