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

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

A

` 400 mu sec`

B

` 6.3 mu sec `

C

` 40 mu sec`

D

`300 mu sec`

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