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A radio active isotope having a half lif...

A radio active isotope having a half life of `3` days was received after `9` days. It was found that there was only `4 gms` of the isotope in the container. The initial weight of the isotope when packed was

A

`8 g`

B

`64 g`

C

`48 g`

D

`32 g`

Text Solution

Verified by Experts

The correct Answer is:
D
`n=(t)/(t_(1/2))=(9)/(3)= 3, W=(W_(0))/(2^(n))`
`W_(0)=2^(n),W=2^(3)(4)=32 gm`
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