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December 20, 2014

Homework Help: phys

Posted by Anonymous on Thursday, June 6, 2013 at 1:20am.

Although most natural potassium nuclei are stable 39K (93.3%) or 41K (6.7%) nuclei, about 0.0117% are radioactive 40K nuclei, which have a half-life of 1.26 billion years. What fraction of all the potassium nuclei in your body will undergo radioactive decay in the next 1.04-year period?

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