State the law of redioactive decay. Plot a graph showing the number (N) of undecayed nuclei as a functin of time (t) for a given radioactive sample having half life `T_(1//2)`
Depict in the plot the number of undecayed nuclei at
(i) `t=3T_(1//2)` and (ii) `t=5T_(1//2)`.

Explanation

Radioactive decay Law: The number of atoms disintergrated per second at any instant is directly proportional to the number of radioactive atoms actually present at that time. The following showing the number `(N)` of undecayed nuclei as a function of time `(t)` for a given radioactive sample.