The half-life of a radioactive element i...

The half-life of a radioactive element is 10 h. The fraction of initial radioactivity of the clement that will remain after 40 h is,

A

`1/2`

B

`1/16`

C

`1/8`

D

`1/4`

Text Solution

Verified by Experts

The correct Answer is:

B

1 half life - 10h
After 40 h - 4 half life's
`N_(0)/2^(N) = N_(0)/2^(4) = N_(0)/16`
`:.` The initial radioactivity of element is `1/16.`

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