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March 26, 2017

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How many half lives will it take for a sample of a radioactive isotope containing 20000 radioactive nuclei to decay to 2000 radioactive nuclei

  • Chemistry - ,

    to 1/10?

    1/10=e^-.692t

    take the ln of each side
    ln .1=-.692t
    t= 3.327 halflives

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