Radioactivity is the spontaneous disintegration or decay of the unstable nucleus of an atom into simpler nuclei during which it releases energy called radiation.These simplernuclei could be those of the same elements or of other elements.
Radioactivity is a natural phenomena and occur mainly in heavier elements such as uranium,thorium,polonium and radium .However,there are very few naturally ocuoccurr radioactive elements such as hydrogen, potassium, and carbon.Radioactive elements release three types of radiation namely
1 Alpha radiation
2 Beta radiation
3 Gamma radiation or rays
There are two types of radioactivity namely
1 Naturally occurring radioactivity
2 Artificially occurring radioactivity
Radioactivity is the concerned with the rearrangement of protons and neutron in the nucleus of an atom.