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12 April, 09:16

Uranium-235 has a half-life of 700 million years. How long does it take a 5-

gram sample of Uranium-235 to decay to a mass of 2.5 grams?

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  1. 12 April, 11:28
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    700 million years

    Explanation:

    The term "half-life" refers to the amount of time it takes for the radioactive isotope to decay to half its original quantity. Here, that means the 5-gram sample will decay to 2.5 grams in one half-life.

    It will take 700 million years for 5 g to decay to 2.5 g.
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