Consider an initially pure `M gm` sample of `X`, an isotope that has a half-life of `T` hour, what is its initial decay rate (`N_A` = Avogadro No, atomic weight of `X` is `A`)

Two radioactive substance X and Y initially contain equal number of nuclei. X has a half life of 1 hour and X has a half-life of 2 hours. After the ratio of activity of X to that of y is

The initial concentration of a radioactive substance is No and its half life is 12 hours. What will be its concentration after 36 hours?

The initial concentration of a radioactive substance is No and its half life is 12 hours. What will be its concentration after 36 hours?

The half life of a radioisotope is 1.5 hours is (the initial mass of isotope is 32 g)