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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)) = 9/2 = 3, W = (W _(0))/(2 ^(n))`
`W _(0) = 2 ^(n), W =2 ^(3) (4) = 32 gm`
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