How is the mean life of a given radiaoactive nucleus related to the decay constant ?

Calculate the ratio of half-life to the mean life of a radioactive sample . If lambda be the decay constant of a radioactive sample.

What is meant by half life of a radioactive substance Write its relation with decay constant.

The average life of a radioactive element is ............. of the decay constant.

The half-life of a certain radioactive nucleus is 3.2 days. Calculate (i) decay constant (ii) average life of radioactive nucleus.

Define average life of a radioactive substance. Obtain the relation between decay constant and average life.