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

The half life of `I""^(131)` is 8 day. Given a sample of `I""^(131)` at t=0, we can assert that a)No nucleus will decay at t=4day b)No nucleus will decay before t=8day c)All nucleus will decay before t=16day d)A given nucleus may decay before

A

All nuclei will decay before t = 16 days

B

No nucleus will decay before t = 4 days

C

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

D

No nucleus will decay before t = 8 days.

Text Solution

Verified by Experts

The correct Answer is:
C
Radioactivity is a spontaneous process and it continues for infinite time to complete decay of the material. The process cannot be controlled by any external influence. Half life, mean life are just mathematical tools for us. Hence the given nucleus may decay at any time after t = 0.
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