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March 28, 2017

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Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a sample of Radium-223 to decrease to 1.00% of its initial value?

  • Chemistry - ,

    (100)*1/2^n=1

    Solve for n

    1/2^n=1/100

    2^n=100

    n=ln(100)/ln(2)

    n* the number of days (11.4) =should give you the length of time it takes for Radium-223 to decrease to 1.00% of its initial value.

  • Chemistry - ,

    75.7 days

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