Physics

Problem

The half-life of

{}^{131}\text{I}

is 8 days. Given a sample of

{}^{131}\text{I}

at time

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