SOLUTIONS TO EXERCISES, LESSON 1

1. d. Element. (para 1-5c)

2. a. Protons. (para 1-5f)

3. c. Isotopes. (para 1-5f)

4. d. The number of protons plus neutrons In the atom. (para 1-7a)

5. b. Alpha, beta, gamma. (para 1-8)

6. d. Gamma rays. (para 1-11g)

7. b. Stays the same. (para 1-8e; table 1-1)

8. c. 1/32. (para 1-9b)

9. a. Exposure. (para 1-11)

10. c. 100 ergs/gram. (para 1-12a; table 1-3)

11. d. Ionization and excitation of the atoms and molecules of that cell.(para 1-16b)

12. b. 200 to 500 rads. (para 1-17e)

13. a. Half-life. (para 1-9b)

14. b. Type of radiation. (para 1-20)

15. c. Gamma and beta. (para 1-21b)

16. d. All of the above. (para 1-18a)

17. c. Increases the rate of mutations already present in the population. (para 1-18e(2))