ch13 nuclear reactions

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Ch 13 Physical Science, Nuclear Reactions study guide

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ch13Student: ___________________________________________________________________________ 1. An alpha particle is really a high-energy electron ejected from the nucleus. True False

2. When undergoes beta-decay, the product is True False

.

3. Isotopes with an even number of both protons and neutrons are generally stable. True False

4. A radioactive decay reaction produces a simpler, more stable nucleus. True False

5. X undergoes radioactive decay to Y with a half-life of five minutes. After 10 minutes, the sample of X has completely decayed to Y. True False

6. Alpha radiation is the least dangerous as alpha particles can be stopped by your skin. True False

7. The threshold model proposes that under a certain level, your body can repair the damage produced by radiation. True False

8. The mass of a nucleus is slightly greater than the sum of the masses of the individual protons and neutrons. True False

9. Nuclear power reactors cannot explode like an atom bomb because there is not enough of the fissionable U235 in a reactor to maintain a chain reaction. True False

10. Airline crews receive roughly three times the background radiation of those of us who spend most of our time on the ground. True False

11. This type of radiation is really the nucleus of a helium atom. A. alpha B. beta C. gamma D. All of the above.

12. This type of radiation can easily pass through a human. A. alpha B. beta C. gamma D. All of the above.

13. This type of radiation ionizes atoms and molecules. A. alpha B. beta C. gamma D. All of the above.

14. Nuclei with a higher than desired neutron-to-proton ratios tend to undergo which type of decay? A. alpha B. beta C. gamma D. All of the above.

15. This type of radiation is released when A. alpha B. beta C. gamma D. All of the above.

decays to

.

16. Which of the following correctly balances this decay reaction? ___ A. B. C. D.

17. Which of the following correctly balances this nuclear fission reaction? A. B. C. D.

18. Isotope A has a half-life measured in minutes, whereas isotope B has a half-life of millions of years. Which is more radioactive? A. isotope A B. isotope B C. Both are equally dangerous. D. It depends on the temperature of each.

19. The decay rate of a radioactive isotope can be increased by increasing the A. temperature. B. pressure. C. size of the sample. D. None of the above.

20. The basic requirement for a fusion reaction is (are) A. temperature on the order of 100 million C. B. dense concentration of hydrogen nuclei. C. confinement at 10 atmospheres pressure for at least one second. D. All of the above.

21. The amount of radiation we are naturally exposed to during a year is nearly A. 150 rem. B. 100 rem. C. 1 rem. D. 0.150 rem.

22. Besides U-235, another isotope that can undergo nuclear fission is A. U-238. B. Pu-239. C. Th-230. D. Pb-210.

23. The protons in a nucleus stay together due to the A. electrostatic force of attraction. B. nuclear force. C. gravitational force. D. binding force.

24. A measure of radiation that takes into account the possible biological damage produced by different types of radiation is called a A. rem. B. rad. C. roentgen. D. curie.

25. A Geiger counter measures radiation indirectly by measuring A. flashes of light. B. speaker static. C. electrons released by ionization. D. curies.

26. As the size of nuclei increases, the ratio of neutrons to protons in the band of stability increases to A. 1.25 to 1. B. 1.5 to 1. C. 2 to 1. D. None of the above.

27. The radioactive isotope Z has a half-life of 12 hours. After 2 days, the fraction of the original amount remaining is A. 1/2. B. 1/4. C. 1/8. D. 1/16.

28. When an isotope releases gamma radiation the atomic number A. decreases by two and the mass number decreases by four. B. increases by one and the mass number remains the same. C. and the mass number decrease by one. D. and the mass number remain the same.

29. The isotope is most likely to emit A. an alpha particle. B. a beta particle. C. a gamma ray. D. It is not possible to predict.

30. Reactor control rods are made of a substance that A. absorbs neutrons. B. emits neutrons. C. reflect neutrons. D. slow down neutrons so they produce more fission.

ch13 Key

1. An alpha particle is really a high-energy electron ejected from the nucleus. FALSE

Blooms Level: 2. Understand Section: 13.01 Tillery - Chapter 13 #1 Topic: Nuclear Chemistry

2. When FALSE

undergoes beta-decay, the product is

.

Blooms Level: 4. Analyze Section: 13.01 Tillery - Chapter 13 #2 Topic: Nuclear Chemistry

3. Isotopes with an even number of both protons and neutrons are generally stable. TRUE

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #3 Topic: Nuclear Chemistry

4. A radioactive decay reaction produces a simpler, more stable nucleus. TRUE

Blooms Level: 2. Understand Section: 13.01 Tillery - Chapter 13 #4 Topic: Nuclear Chemistry

5. X undergoes radioactive decay to Y with a half-life of five minutes. After 10 minutes, the sample of X has completely decayed to Y. FALSE

Blooms Level: 4. Analyze Section: 13.01 Tillery - Chapter 13 #5 Topic: Nuclear Chemistry

6. Alpha radiation is the least dangerous as alpha particles can be stopped by your skin. FALSE

Blooms Level: 2. Understand Section: 13.01 Tillery - Chapter 13 #6 Topic: Nuclear Chemistry

7. The threshold model proposes that under a certain level, your body can repair the damage produced by radiation. TRUE

Blooms Level: 3. Apply Section: 13.02 Tillery - Chapter 13 #7 Topic: Nuclear Chemistry

8. The mass of a nucleus is slightly greater than the sum of the masses of the individual protons and neutrons. FALSE

Blooms Level: 3. Apply Section: 13.03 Tillery - Chapter 13 #8 Topic: Nuclear Chemistry

9. Nuclear power reactors cannot explode like an atom bomb because there is not enough of the fissionable U235 in a reactor to maintain a chain reaction. FALSE

Blooms Level: 3. Apply Section: 13.03 Tillery - Chapter 13 #9 Topic: Nuclear Chemistry

10. Airline crews receive roughly three times the background radiation of those of us who spend most of our time on the ground. TRUE

Blooms Level: 3. Apply Section: 13.02 Tillery - Chapter 13 #10 Topic: Nuclear Chemistry

11. This type of radiation is really the nucleus of a helium atom. A. alpha B. beta C. gamma D. All of the above.

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #11 Topic: Nuclear Chemistry

12. This type of radiation can easily pass through a human. A. alpha B. beta C. gamma D. All of the above.

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #12 Topic: Nuclear Chemistry

13. This type of radiation ionizes atoms and molecules. A. alpha B. beta C. gamma D. All of the above.

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #13 Topic: Nuclear Chemistry

14. Nuclei with a higher than desired neutron-to-proton ratios tend to undergo which type of decay? A. alpha B. beta C. gamma D. All of the above.

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #14 Topic: Nuclear Chemistry

15. This type of radiation is released when A. alpha B. beta C. gamma D. All of the above.

decays to

.

Blooms Level: 4. Analyze Section: 13.01 Tillery - Chapter 13 #15 Topic: Nuclear Chemistry

16. Which of the following correctly balances this decay reaction? ___ A. B. C. D.

Blooms Level: 4. Analyze Section: 13.01 Tillery - Chapter 13 #16 Topic: Nuclear Chemistry

17. Which of the following correctly balances this nuclear fission reaction? A. B. C. D.

Blooms Level: 4. Analyze Section: 13.01 Tillery - Chapter 13 #17 Topic: Nuclear Chemistry

18. Isotope A has a half-life measured in minutes, whereas isotope B has a half-life of millions of years. Which is more radioactive? A. isotope A B. isotope B C. Both are equally dangerous. D. It depends on the temperature of each.

Blooms Level: 4. Analyze Section: 13.01 Tillery - Chapter 13 #18 Topic: Nuclear Chemistry

19. The decay rate of a radioactive isotope can be increased by increasing the A. temperature. B. pressure. C. size of the sample. D. None of the above.

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #19 Topic: Nuclear Chemistry

20. The basic requirement for a fusion reaction is (are) A. temperature on the order of 100 million C. B. dense concentration of hydrogen nuclei. C. confinement at 10 atmospheres pressure for at least one second. D. All of the above.

Blooms Level: 3. Apply Section: 13.03 Tillery - Chapter 13 #20 Topic: Nuclear Chemistry

21. The amount of radiation we are naturally exposed to during a year is nearly A. 150 rem. B. 100 rem. C. 1 rem. D. 0.150 rem.

Blooms Level: 2. Understand Section: 13.02 Tillery - Chapter 13 #21 Topic: Nuclear Chemistry

22. Besides U-235, another isotope that can undergo nuclear fission is A. U-238. B. Pu-239. C. Th-230. D. Pb-210.

Blooms Level: 2. Understand Section: 13.03 Tillery - Chapter 13 #22 Topic: Nuclear Chemistry

23. The protons in a nucleus stay together due to the A. electrostatic force of attraction. B. nuclear force. C. gravitational force. D. binding force.

Blooms Level: 3. Apply Section: 13.01 Tillery - Chapter 13 #23 Topic: Nuclear Chemistry

24. A measure of radiation that takes into account the possible biological damage produced by different types of radiation is called a A. rem. B. rad. C. roentgen. D. curie.

Blooms Level: 3. Apply Section: 13.02 Tillery - Chapter 13 #24 Top

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