Question
A sample of a radioactive isotope is measured to have an activity of $240.0 \mathrm{mCi}$. If the sample has a half-life of 14 days, how many nuclei of the isotope are there at this time?
Step 1
The activity \( A \) of a radioactive sample is given by the equation: \[ A = \lambda N \] where \( \lambda \) is the decay constant and \( N \) is the number of radioactive nuclei. Show more…
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