# NEET Physics Nuclei Questions Solved

The half life of ${}^{131}\mathrm{I}$ is 8 days. Given a sample of ${}^{131}\mathrm{I}$ 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