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19 March, 21:39

What is the decay constant of 23892u whose half-life is 4.5*109year?

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  1. 20 March, 00:29
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    Answer is: decay constant for uranium-238 is 1,54·10⁻¹⁰ 1/y.

    The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration.

    t1/2 = 4.5·10⁹ y.

    λ = 0,693 : t1/2.

    λ = 0,693 : 4.5·10⁹ y.

    λ = 1,54·10⁻¹⁰ 1/y.

    λ - decay constant.

    Decay constant is proportionality between the size of a number of radioactive atoms (in this example uranium) and the rate at which the number of radioactive uranium atoms decreases because of radioactive decay.
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