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The half life of .^(215)At is 100mu s. T...

The half life of `.^(215)At` is `100mu s`. The time taken for the radioacticity of `.^(215)At` to decay to `1//16^(th)` of its initial value is:

A

`400mu s`

B

`6.3mu s`

C

`40mu s`

D

`300mu s`

Text Solution

Verified by Experts

The correct Answer is:
`(a)`
`(1)/(16) = (1)/(2^(4)), :. n = 4, t_(1//2) = 100 mu s`
`:. T = t_(1//2) xx n`
`= 100xx4 = 400 mu s`
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