Question

what is radioactivity

Answer 1

Radio activity is a nuclear phenomenon. It is the spontaneous emission of alpha or beta and gamma radiations from the nucleus of a radioactive substance.

Answer 2

Radioactivity is simply when very small particles in objects emit energy or smaller particles. The energy that is produced can result in cancer, serious environmental damage, or helpful technologies. There are different degrees of radioactivity, and different exposures increase the harm it can cause.