A sample of a radioactive isotope is measured to have an
A sample of a radioactive isotope is measured to have an activity of 237.1 mCi.
If the sample has a half-life of 12 days, how many nuclei of the isotope are there at this time?
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a sample of a radioactive isotope is measured to have an activity of 2371 mciif the sample has a half-life of 12 days
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