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A sample of radioactive substance with a...

A sample of radioactive substance with a `t_(1//2)=3` days was found to contain 3 g of it, when received exactly after 12 days. The amount of radioactive substance when it was sealed was

A

6 g

B

12 g

C

24 g

D

48 g

Text Solution

Verified by Experts

The correct Answer is:
D
`n=(t)/(t_(1//2))=(12)/(3)=4`
`N_(0)=2^(n).N=2^(4)xx3 g =48 g`
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