Question

Give two differences between the radioactive decay and nuclear fission.

Answer 1

Radioactive decay	Nuclear fission
It is a spontaneous process and occurs by itself.	It does not occur by itself.Neutrons are bombarded on a heavy nucleus.
The nuclie emits either the $\alpha$ or $\beta$ particles with the emission of energy in form of $\gamma$ rays which is not very large.	On bombardment of a heavy nucleus with neutrons, a tremendous amount of energy released and the nucleus splits in two nearly equal fragments.
The rate of radioactive decay cannot be controlled.	The rate of nuclear fission can be controlled.