Question

1.248 X 109 EXAM 13. A 75.0kg man typically contains about 300g of potassium in his body. Given that potassium-40 makes up 0.012% of any sample of potassium and the half-life of potassium-40 is 1.248 x 109 years, how many radioactive decays per year come from his body due to potassium-40? Laboratory 15 | Radioactivity of Potassium - 40 183

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Answer 1

1 1.248X10 a.c93 Tve 12 481o No f K-atom 23 300 x.o22 X lO 11 39 24 etons = 4-632 x 10 K C.O12 % NOrod tams 24 4.632 X1O O.O 2 NK Achivity 17 decay 24 4.632 x10 YR. O.O12 O.693 1- 24 8 X10 10 -d N 30.865 decaj lyR surr