Question

What is meant by radioactivity ?

Answer 1

radioactivity means activities done by electro radiation .it doesn't required medium.

it is divided into three parts:-alpha,bita,gama

Answer 2

Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. ... The most common types of radiation are called alpha, beta, and gamma radiation, but there are several other varieties of radioactive decay.