Write down the law of radioactive decay .

Radioactive decay is a

Write the law of radioavtive decay. Decay constant of a radioactive substances is 10^(-3) per year. Calculate its half-life time in year.

Write the law of radioavtive decay. Decay constant of a radioactive substances is 10^(-3) per year. Calculate its half-life time in year.

Deduce the expression, N=N_(0)^(-lambdat) for the law of radioactive decay. (b) Is the nucleus formed in the decay of the nucleus ._(11)^(12)Na , an isotope or isobar?