Question

what are nuclide on the basis of radioactivity?

Answer 1

A radionuclide is an atom which has excess nuclear energy which makes it unstable. The excess energy can be emitted from the nucleus as gamma radiation, it can create and emit a new particle from the nucleus. The excess energy may to transferred to one of its electrons and eject that electron as a conversion electron. The radionuclide undergoes radioactive decay during these processes.