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1g of a radioactive substance disintegra...

1g of a radioactive substance disintegrates at the rate of `3.7xx10^(10)` disintegrations per second. The atomic massof the substance is 226. Calculate its mean life.

A

`1.2 xx 10 ^(5) s`

B

`1.39 xx 10 ^(11)`

C

`2.1 xx 10 ^(5) s`

D

`7.194 xx 10 ^(10) s`

Text Solution

Verified by Experts

The correct Answer is:
D
`(N)/( N _(0)) = (1)/( 2 ^(n))`
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