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The half life of .^(131)I is 8day. Given...

The half life of `.^(131)I` is 8day. Given a sample of `.^(131)1` at `t = 0`, we can assert that:

A

No nucleus will decay before t = 4 days

B

No nucleus will decay before t = 8 days

C

All nuclei will decay before t = 16 days

D

A given nucleus may decay at any time after t = 0

Text Solution

Verified by Experts

The correct Answer is:
D
`N = N_(0)e^(-lambdat)`
decay process lasts up to t = `oo`
Hence , a given nucleus may decay at any time after t = 0 .
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