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A 2.71 g sample of KCl from the chemistry stockroom is found to be radioactive, and it is decaying at a constant rate of 4490 Bq. The decays are traced to the element potassium and in particular to the isotope 40K, which constitutes 1.17% of normal potassium. Calculate the half-life of this nuclide. [Given MK=39.102 g/mol, MCl=35.453 g/mol] |
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Answer» A 2.71 g sample of KCl from the chemistry stockroom is found to be radioactive, and it is decaying at a constant rate of 4490 Bq. The decays are traced to the element potassium and in particular to the isotope 40K, which constitutes 1.17% of normal potassium. Calculate the half-life of this nuclide. |
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