HALF-LIFE TIME

Many unstable nuclie can decay spontaneously to a nucleus of lower mass but differnet combination of nucleons. The process of spontaneous emission of radiation is called radioactivity substance. Radioactive decay is a statistical process. Radiaactivity is independent of all external conditions. The number of decays per unit time or decay rate is called activity. Activity exponentially decrease with time. Mean lifetime is always greater than half-life time. If T_(H) is the half-life and T_(M) is the mean life. Which of the following statement is correct.

Half Life Method

Half Life And Average Life

Relation between average life time (tau) and half-life (T_(1/2)) is

Assertion (A): For a first order reaction, half-life period is independent of initial concentration of the reacting species.