Answer to Question #95987 in Atomic and Nuclear Physics for Zahir

Question #95987
The half life of radium is 1600 years. If a sample of radium-226 has an original activity of 200 bq, what will it’s activity be after 4800 years
1
Expert's answer
2019-10-07T10:56:56-0400

After time "t" the number of radium atoms will be "2^{-t\/T}" times its original number, where "T" is the half-life time. In our case, "t\/T = 4800\/1600 = 3", and "2^{-3} = 1\/8". Since the radioactivity is proportional to the number of radioactive atoms, it will decrease 8 times and, therefore, will constitute 200/8 = 25 bq. The answer is: 25 bq.


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Comments

Rose Mercy
04.06.22, 21:43

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Nia Morris
02.11.21, 19:10

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