1. CHEMISTRY AN INTRODUCTION TO GENERAL, ORGANIC, AND BIOLOGICAL CHEMISTRY CRS “Clicker” Questions Chapter 9 Nuclear Radiation
Eleventh Edition
Nancy Gardner

2. CHAPTER 9: NUCLEAR RADIATION
9.1 A positron is produced by an unstable nucleus. In this process, a _____ is transformed into a _____.
A. proton; electron
B. neutron; proton
C. proton; neutron
D. neutron; electron
Answer: C

3. CHAPTER 9: NUCLEAR RADIATION
9.2 The nuclear decay of cobalt produces two products, one of which is nickel, according to the following equation.
What is the missing particle?
A. beta particle
B. neutron
C. alpha particle
D. hydrogen atom
Answer: A

4. CHAPTER 9: NUCLEAR RADIATION
9.3 A sample of iodine-131 has an activity of 3.0 Ci. The recommended dosage of iodine-131 is 4.20 Ci/kg of body weight. What is the number of microcuries of iodine-131 needed for a 70.0-kg patient with hyperthyroidism?
A microcuries
B microcuries
C microcuries
D microcuries
Answer: C

5. CHAPTER 9: NUCLEAR RADIATION
9.4 Strontium-85, used for bone scans, has a half-life of 64 days. How long will it take for the radiation level of strontium-85 to drop to one-fourth of its original level?
A. 90 days
B days
C days
D days
Answer: B

6. CHAPTER 9: NUCLEAR RADIATION
9.5 Iodine-131 is used for the diagnosis of _____ problems.
A. pancreatic cancer
B. skeletal imaging
C. treatment of breast cancer
D. thyroid function
Answer: D

7. CHAPTER 9: NUCLEAR RADIATION
9.6 Nuclear fission is the bombardment of a _____ nucleus by a _____ particle, splitting it into two medium-weight atoms. In this process a tremendous amount of energy is released.
A. Cl-35; beta particle
B. I-131; alpha particle
C. U-235; neutron particle
D. U-235; beta particle
Answer: C 7

8. CHAPTER 9: NUCLEAR RADIATION
9.7 Technetium-99 is a radioisotope used in nuclear medicine for many diagnostic procedures, including detecting brain tumors. Many laboratories have small generators containing molybedenum-99, which decays to give technetium-99. What other particle is produced in this process? A. B. C.
D. none of these
Answer: A

9. CHAPTER 9: NUCLEAR RADIATION
9.8 What is the product from the alpha decay of Es-252?
A. Bk-248
B. Es-246
C. Am-250
D. Am-248
Answer: A 9

10. CHAPTER 9: NUCLEAR RADIATION
9.9 What is the product from the beta decay of Th-234?
A. Th-234
B. Pa-234
C. U-238
D. Th-232
Answer: B 10

11. CHAPTER 9: NUCLEAR RADIATION
9.10 What is the product from the positron emission of B-8?
A. N-8
B. Li-8
C. Be-8
D. C-8
Answer: C 11

12. CHAPTER 9: NUCLEAR RADIATION
9.11 In a diagnostic test for leukemia, a patient receives 4.0 mL of a solution containing selenium-75. If the activity of the selenium-75 is 45.0 Ci/mL, what is the dose received by the patient?
A microcuries
B microcuries
C microcuries
D microcuries
Answer: D

13. CHAPTER 9: NUCLEAR RADIATION
9.12 A nurse was accidentally exposed to potassium-42 while doing brain scans for possible tumors. The incident was not discovered until 36.0 h later, when the activity of potassium-42 was 2.0 Ci. If potassium-42 has a half-life of 12.0 h, what was the activity of the sample the nurse was exposed to?
A microcuries
B microcuries
C microcuries
D microcuries
Answer: C

14. CHAPTER 9: NUCLEAR RADIATION
9.13 A mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life of 6.0 h, how much of the technetium-99m sample remains 24.0 h after the test?
A mg
B mg
C mg
D mg
Answer: D

15. CHAPTER 9: NUCLEAR RADIATION
9.14 How many neutrons are released in the third stage of the chain reaction of U-235 fusion?
A. 81
B. 27
C. 9
D. 3
Answer: B 15