The radioactive nuclide 199Pt has a half-life of 30.8
Chapter 43, Problem 43.29(choose chapter or problem)
The radioactive nuclide 199Pt has a half-life of 30.8 minutes. A sample is prepared that has an initial activity of 7.56 * 1011 Bq. (a) How many 199Pt nuclei are initially present in the sample? (b) How many are present after 30.8 minutes? What is the activity at this time? (c) Repeat part (b) for a time 92.4 minutes after the sample is first prepared.
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