30_InstSolManual_PDF_Part4 - l 5 ln 2 T 1 2 5 ln 2 300.0 s...

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(c) The Segre chart is given in Figure 30.11. Figure 30.11 Reflect: Each decay conserves charge and nucleon number. 30.12. Set Up: The mass of a single nucleus is and Solve: 30.13. Set Up: After one half-life the activity decreases by a factor of Solve: (a) (b) (i) After 5.00 min the decay rate is (ii) After an additional 5.00 min the decay rate is (iii) 25.0 min is three half-lives after 10.0 min so the decay rate is 30.14. Set Up: The activity is In one the number of radioactive nuclei halves. Solve: (a) N 0 5 0 D N / D t 0 0 l 5 16.0 3 10 10 Bq 1.52 3 10 2 4 s 2 1 5 1.05 3 10 15 nuclei. l 5 ln 2 4560 s 5 1.52 3 10 2 4 s 2 1 . l 5 ln 2 T 1 / 2 . 4560 s. T 1 / 2 5 76.0 min 5 T 1 / 2 P D N D t P 5 l N . 1 1.50 3 10 3 Bq 2 / 1 2 3 2 5 188 Bq 1 3.00 3 10 3 Bq 2 / 2 5 1.50 3 10 3 Bq 1 6.00 3 10 3 Bq 2 / 2 5 3.00 3 10 3 Bq l 5
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Unformatted text preview: l 5 ln 2 T 1 / 2 5 ln 2 300.0 s 5 2.31 3 10 2 3 s 2 1 1 2 . T 1 / 2 5 ln 2 l T 1 / 2 5 ln 2 l 5 ln 2 1.28 3 10 2 11 s 2 1 5 5.42 3 10 10 s 5 1720 yr l 5 D N / D t N 5 6.24 3 10 11 Bq 4.86 3 10 22 5 1.28 3 10 2 11 s 2 1 N 5 8.50 3 10 2 3 kg 1.75 3 10 2 25 kg 5 4.86 3 10 22 ; T 1 / 2 5 ln 2 l . D N / D t 5 l N 105 m p 5 1.75 3 10 2 25 kg. 232 Th 228 Ra 228 Th 128 Ac 224 Ra 220 Rn 216 Po 212 Pb 212 Bi 212 Po 208 Pb Tl Pb Bi Po Rn Ra Ac Th 208 Tl 142 N Z 140 138 136 134 132 130 128 126 80 81 82 83 84 86 88 89 90 a a a a a a a b b b b 30-4 Chapter 30...
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