A radioactive sample having N nuclei has activity R. Write down an expression for its half life in terms of R and N.

A radioactive substance having N nuclei has activity A. Write down an expression for its half life in terms of A and N?

A radioactive substnce havig N nuclei has activity R.Write down an expressin for its half-life in terms of R and N.

A radioactive sample has initial concentration N_(0) of nuclei. Then,

A radioactive sample has initial concentration N_(0) of nuclei. Then,

A radioactive sample has N_0 active at t = 0 . If the rate of disintegration at any time is R and the number of atoms is N , them the ratio R//N varies with time as.

A radioactive sample has N_0 active at t = 0 . If the rate of disintegration at any time is R and the number of atoms is N , them the ratio R//N varies with time as.