Question

The reciprocal of decay constant is that time during which the
number of active nuclei of radioactive substaħce reduces - times of
the initial value of number of nuclei. Prove it.​

Answer 1

Explanation:

The radioactive decay constant can may be defined as the reciprocal of the time during which the number of atoms is a radioactive substance reduces to 36.8 % of their initial number. It is the time interval in which the mass of a radioactive substance or the number of its atoms is reduced to half of its initial value