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AP Chem CH 21: Nuclear Chemistry Independent Study SEE Website Read CH 21 and answer the following questions. 1. Write the nuclear equation for decay of plutonium 242 by alpha emission. 2. What is meant by mass defect? 3. Describe how alpha, beta, and gamma rays each behave when passed through an electric field. Draw a picture. 4. Why is it not possible to eliminate the hazard of nuclear waste by the process of incineration? 5. 21.2 6. 21.6 7. 21.8 8. 21.12 a and b only 9. 21.14 a and b only 10. 21.17 11. 21.24 12. How does a nuclear reactor work? 13. A sample is found to contain 1.50 mg of iodine-131. The sample is examined again later and found to contain 1.30 mg of iodine-131. How much time passed between the determinations of the amount of iodine-131 sample? 14-24.Answer the multiple choice questions attached and free response question 25. Read about Japanese nuclear power plant accident. Write facts about the accident and current effects. ( ½ page) Multiple Choice 30. When 214 84 Po decays, the emission consists consecutively of an alpha particle, then two beta particles, and finally another alpha particle. The resulting stable nucleus is… 210 206 208 210 (A) 206 83Bi (B) 83Bi (C) 82Pb (D) 82Pb (E) 81Tl 38. The radioactive decay of 146C to 147N occurs by the process of… (A) beta particle emission (B) alpha particle emission (C) positron emission (D) electron capture (E) neutron capture 18. For the types of radiation given, which of the following is the correct order of increasing ability to penetrate a piece of lead? (A) Alpha particles < gamma rays < beta particles (B) Alpha particles < beta particles < gamma rays (C) Beta particles < alpha particles < gamma rays (D) Beta particles < gamma rays < alpha particles (E) Gamma rays < alpha particles < beta particles 38. Cf 2 01 n + 251 98 131 54 Xe + ____ What is the missing product in the nuclear reaction represented above? (A) 11 4 42 Mo (B) 11 8 44 Ru (C) 120 42 Mo (D) 12 0 44 Ru (E) 12 2 46 Pd 68. The specific rate constant k for radioactive element X is 0.023 min−1. What weight of X was originally present in a sample if 40 grams is left after 60 minutes? (A) 10 grams (B) 20 grams (C) 80 grams (D) 120 grams (E) 160 grams 21. Correct statements about alpha particles include which of the following? I. They have a mass number of 4 and a charge of +2. II. They are more penetrating than beta particles. III. They are helium nuclei. (A) I only (B) III only 72. The nuclide (A) 245 94 Pu 245 96 (B) (C) I and II (D) I and III (E) II and III Cm is radioactive and decays by the loss of one beta particle. The product nuclide is… 245 95 Am (C) 248 96 Cm (D) 250 96 Cm (E) 245 97 Bk 48. If 87.5 percent of a sample of pure Iodine-131 decays in 24 days, what is the half-life of Iodine-131? (A) 6 days (B) 8 days (C) 12 days (D) 14 days (E) 21 days U + n → Cs + 3 n + X 23. Neutron bombardment of uranium can induce the reaction represented above. Nuclide X is which of the following? 235 92 (A) 92 35 Br (B) 94 35 Br (C) 91 37 1 0 141 55 1 0 Rb (D) 92 37 (E) 94 37 Rb Rb FREE RESPONSE Answer each of the following questions regarding radioactivity. 234 94 a) Write the nuclear equation for decay of Pu by alpha emission. b) Account for the fact that the total mass of the products of the reaction in part (a) is slightly less than that of the original 234 94 Pu. c) Describe how , , and rays each behave when they pass through an electric field. Use the diagram below to illustrate your answer.