Nuclear chemistry is the field of chemistry that deals with radioactivity which is a result of a natural change of an isotope of one element into an isotope of different element and nuclear processes. There are basically three types of radiation and nuclear changes- Alpha Radiation, Beta Radiation and Gamma Radiation.
While radioactivity goes decay naturally, nuclear reactions occur in two types- Nuclear Fission and Nuclear Fusion. Nuclear fusion tends to release tremendous amount of energy and thus also called as thermonuclear reaction. The use of nuclear chemistry is increasing drastically over time like providing world electricity, a very important factor for pharmaceutical industries, food and agriculture, medical and also commercial purpose.