The radioactive nuclide 199 Pt has a half-life of 30.8 minutes. A sample is prepared that has an initial activity of 7.56 x1011 Bq. (a) How many 199 Pt 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.

The radioactive nuclide 199 Pt has a half-life of 30.8 minutes. A sample is prepared that has an initial activity of 7.56 x1011 Bq. (a) How many 199 Pt 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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Question

The radioactive nuclide¹⁹⁹ Pt has a half-life of 30.8 minutes. A sample is prepared that has an initial activity of 7.56 x10¹¹ Bq. (a) How many ¹⁹⁹ Pt 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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