Today we are going to see what Fusion, Fission and radioactive decay is.
Fussion is Fusion is the process that powers the sun and the stars. It is the reaction in which two atoms of hydrogen combine together, or fuse, to form an atom of helium. In the process some of the mass of the hydrogen is converted into energy. ... Thus fusion has the potential to be an inexhaustible source of energy.
A fusion is a atom coming to gather just like this.
A fission is an atom that splits off in different ways.
A radioactive decay is radioactive so it is very deadly.