Describes briefly the development of a new element known as plutonium and shows how an element of atomic number 94 is sensitive to neutron which fissions to U-235 emitting other neutrons producing a chain reaction which can be used instead of U-235. Plutonium can be separated from natural uranium and can also be made from U-238.Different steps are given by which plutonium is fissioned out, and more elements are likely to be synthesized within the next few years.