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The half life of .92U^(238) against alp...

The half life of `._92U^(238)` against `alpha` decay is `1.5xx10^(17)s`. What is the activity of the sample of `._92U^(238)` having `2.5xx10^(21)` atom?

Text Solution

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Here, `T=1.5xx10^(17)s` ,
R=?
`N=2.5xx10^(21)`
`R=lambda N=(0.693N)/T=(0.693xx2.5xx10^(21))/(1.5xx10^(17))`
`=11550 "disintegrations"//"sec".`
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