1. Chapter 21 Preview Multiple Choice Short Answer
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Preview
Multiple Choice
Short Answer

2. Chapter 21 Multiple Choice 1. Complete the following nuclear equation:
Standardized Test Preparation
Multiple Choice
1. Complete the following nuclear equation: A. B. C. D.

3. Chapter 21 Multiple Choice 1. Complete the following nuclear equation:
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Multiple Choice
1. Complete the following nuclear equation: A. B. C. D.

4. Chapter 21 Multiple Choice 2. The mass of the nucleus is
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Multiple Choice
2. The mass of the nucleus is
A. greater than the mass of the protons and neutrons that make up the nucleus.
B. equal to the mass of the protons and neutrons that make up the nucleus.
C. less than the mass of the protons and neutrons that make up the nucleus.
D. converted to energy.

5. Chapter 21 Multiple Choice 2. The mass of the nucleus is
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Multiple Choice
2. The mass of the nucleus is
A. greater than the mass of the protons and neutrons that make up the nucleus.
B. equal to the mass of the protons and neutrons that make up the nucleus.
C. less than the mass of the protons and neutrons that make up the nucleus.
D. converted to energy.

6. Chapter 21 Multiple Choice
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Multiple Choice
3. Which type of radiation has the most penetrating ability?
A. an alpha particle
B. a beta particle
C. a gamma ray
D. a neutron

7. Chapter 21 Multiple Choice
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Multiple Choice
3. Which type of radiation has the most penetrating ability?
A. an alpha particle
B. a beta particle
C. a gamma ray
D. a neutron

8. Chapter 21 Multiple Choice
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Multiple Choice
4. Which two particles have the same mass but opposite charge?
A. a beta particle and a positron
B. a neutron and a proton
C. a proton and an electron
D. an alpha particle and a proton

9. Chapter 21 Multiple Choice
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Multiple Choice
4. Which two particles have the same mass but opposite charge?
A. a beta particle and a positron
B. a neutron and a proton
C. a proton and an electron
D. an alpha particle and a proton

10. Chapter 21 Multiple Choice
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Multiple Choice
5. Which of the following nuclear equations is correctly balanced? A. B. C. D.

11. Chapter 21 Multiple Choice
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Multiple Choice
5. Which of the following nuclear equations is correctly balanced? A. B. C. D.

12. Chapter 21 Multiple Choice 6. Gamma rays
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Multiple Choice
6. Gamma rays
A. have the same energy as beta particles do.
B. are visible light.
C. have no charge and no mass.
D. are not a form of electromagnetic radiation.

13. Chapter 21 Multiple Choice 6. Gamma rays
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Multiple Choice
6. Gamma rays
A. have the same energy as beta particles do.
B. are visible light.
C. have no charge and no mass.
D. are not a form of electromagnetic radiation.

14. Chapter 21 Multiple Choice
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Multiple Choice
7. Which of the following nuclides is radioactive? A. B. C. D.

15. Chapter 21 Multiple Choice
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Multiple Choice
7. Which of the following nuclides is radioactive? A. B. C. D.

16. Chapter 21 Multiple Choice
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Multiple Choice
8. The half-life of thorium-234 is 24 days. If you have a 42.0 g sample of thorium-24, how much will remain after 72 days?
A g
B g
C g
D g

17. Chapter 21 Multiple Choice
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Multiple Choice
8. The half-life of thorium-234 is 24 days. If you have a 42.0 g sample of thorium-24, how much will remain after 72 days?
A g
B g
C g
D g

18. Chapter 21 Multiple Choice
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Multiple Choice
9. It takes 5.2 min for a 4.0 g sample of francium-210 to decay until only 1.0 g is left. What is the half-life of francium-210?
A. 1.3 min
B. 2.6 min
C. 5.2 min
D. 7.8 min

19. Chapter 21 Multiple Choice
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Multiple Choice
9. It takes 5.2 min for a 4.0 g sample of francium-210 to decay until only 1.0 g is left. What is the half-life of francium-210?
A. 1.3 min
B. 2.6 min
C. 5.2 min
D. 7.8 min

20. Chapter 21
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Short Answer
10. Write the nuclear equation that represents the process in which a neutron in the nucleus is changed to a proton with the emission of a beta particle.

21. Chapter 21
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Short Answer
10. Write the nuclear equation that represents the process in which a neutron in the nucleus is changed to a proton with the emission of a beta particle.
Answer:

22. Chapter 21
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Short Answer
11. Describe a positron, and write its nuclear symbol.

23. Chapter 21
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Short Answer
11. Describe a positron, and write its nuclear symbol.
Answer: A positron is a positively charged particle with the same mass as a beta particle.

24. Chapter 21
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Short Answer
12. Explain the difference between nuclear fission and nuclear fusion, and explain the energy changes that accompany each process.

25. Chapter 21
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Short Answer
12. Explain the difference between nuclear fission and nuclear fusion, and explain the energy changes that accompany each process.
Answer: Fission occurs when a heavy nuclide is bombarded with nucleons, such as neutrons and disintegrates into two smaller nuclides producing more neutrons and energy. Fusion occurs when two light nuclides combine to form a heavier nuclide and energy.

26. Chapter 21 Short Answer 13. What is meant by the term mass defect?
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Short Answer
13. What is meant by the term mass defect?

27. Chapter 21 Short Answer 13. What is meant by the term mass defect?
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Short Answer
13. What is meant by the term mass defect?
Answer: A nuclide is made of a certain number of
protons, neutrons, and electrons. The mass of a
nuclide is less than the mass of the nuclide’s
constituent protons, neutrons, and electrons. The
difference in mass is the mass defect, and the
difference in mass represents the binding energy of
the nucleus.