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Unformatted text preview: Unit 8: Nuclear Chemistry 50 point quiz (MC = 2 points each, SA = 10 points) 1. The decay of which radioisotope can be used to estimate the age of the fossilized remains of an insect? a. Rn222 c. Co60 b. I131 d. C14 2. Which equation represents a transmutation reaction? a. 239 92 U 239 92 U + b. 14 6 C 14 7 N + 1 e c. C 3 H 8 + 5O 2 3CO 2 + 4H 2 O d. n C 2 H 4 + catalyst (C 2 H 4) n 3. Which equation represents positron decay? a. 87 37 Rb 1 e + 87 38 Sr b. 227 92 U 223 90 Th + 4 2 He c. 27 13 Al + 4 2 He 30 15 P + 1 n d. 11 6 C +1 e + 11 5 B 4. Which equation represents a fusion reaction? a. H 2 O(g) H 2 O(l) b. C(s) + O 2 (g) CO 2 (g) c. 2 1 H + 3 1 H 4 2 He + 1 n d. 235 92 U + 1 o n 142 56 Ba + 91 36 Kr + 3 1 o n 5. Which reaction is an example of natural transmutation? a. 239 94 Pu 235 92 U + 4 2 He b. 27 13 Al + 4 2 He 30 15 P + 1 o n c. 238 92 U + 1 n 239 94 Pu + 21 e d. 239 94 Pu + 1 n 147 56 Ba + 90 38 Sr + 3 1 o n 6. Which statement best describes gamma radiation? a. It has a mass of 1 and a charge of 1 b. It has a mass of 0 and a charge of 1 c. It has a mass of 0 and a charge of 0 d. It has a mass of 4 and a charge of +2 7. Which best describes the type of reaction shown below and the overall energy change that occurs? a. Nuclear, energy is released b. Nuclear, energy is absorbed c. Chemical, energy is released d. Chemical, energy is absorbed 8. Based on Table N, what fraction of a radioactive 90 Sr sample would remain unchanged after 56.2 remain unchanged after 56....
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This note was uploaded on 01/01/2012 for the course CHEM 101 taught by Professor Donahue during the Spring '11 term at Long Island U..
 Spring '11
 DONAHUE
 Nuclear Chemistry

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