Nuclide ^{131}I is radioactive, with a half-life of 8.04 days. At noon on January 1 , activity of a

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13.Nuclei

medium

The nuclide $^{131}I$ is radioactive, with a half-life of $8.04$ days. At noon on January $1$, the activity of a certain sample is $60089$. The activity at noon on January $24$ will be

$75\, Bq$

Less than $75\, Bq$

More than $75\, Bq$

$150\, Bq$

Solution

(c) Number of days from January $1^{st}$ to January $24^{th}$ = $23$ days.
Number of half lives $n =$ $\frac{{23}}{{8.04}} = 2.86( < 3)$
In three half lives activity becomes $75\, Bq$, but the given number of half lives are lesser than $3$ so activity becomes greater than $75\, Bq.$

Standard 12

Physics

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easy

Explain decay constant and write down its definition.

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medium

The nuclide $^{131}I$ is radioactive, with a half-life of $8.04$ days. At noon on January $1$, the activity of a certain sample is $60089$. The activity at noon on January $24$ will be

Solution

Similar Questions

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