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If there is a radiation that has a half life of 10 days and we have it for 110 days, what will be the fraction of radiation left?

  • Chemistry - ,

    k = 0.693/t1/2
    Solve for k and substitute into the equation below.

    ln(No/N) = kt.
    No = atoms to start.
    N = atoms left
    k from above.
    t = time.
    There is no No to start; the problem asks for the fraction left or N/No; therefore, you want to solve for No/N and take the reciprocal.

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