The radioactive isotope Gold-198 has a half-life of 64.80 hrs. A sample  containing this isotope has an initial activity of 40.0 µCi. Calculate the number  of nuclei that will decay in the time interval from 10 hrs to 12 hrs.

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Chapter29: Nuclear Physics
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E. The radioactive isotope Gold-198 has a half-life of 64.80 hrs. A sample 

containing this isotope has an initial activity of 40.0 µCi. Calculate the number 

of nuclei that will decay in the time interval from 10 hrs to 12 hrs.

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