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

Options

A. no nucleus will decay before `t=4days`
B. no nucleus will decay before `t=8days`
C. all nucleus will decay before `t=16days`
D. a given nucleus may decay at any tiem after `t=0` .

Answer

d

Explanation

As we regard the deac y process as a spontaneous ans statistical process, therefore the decay can start any time after `t=0`. Therefore, the answer is (d)