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

Options

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

Answer

C

Explanation

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