Question #268702

Cobalt-60 has a half-life of approximately 5 years. If there was one microgram present in a sample originally, how many atoms would have decayed after 20 years?

1
Expert's answer
2021-11-21T17:26:19-0500

N=mMNA(1−2−tT)=9.4⋅1018.N=\frac mMN_A(1-2^{-\frac tT})=9.4\cdot 10^{18}.


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