Natural potassium contains 40k which has a half-life of
(a) Natural potassium contains 40K, which has a half-life of 1.277 x 109 y. What mass of 40K in a person would have a decay rate of 4180Bq?
(b) What is the fraction of 40K in natural potassium, given the person has 140 g in his body?
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a natural potassium contains 40k which has a half-life of 1277 x 109 y what mass of 40k in a person would have a decay
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