A nuclear weapon

 A nuclear weapon is a device that uses nuclear fission, nuclear fusion, or a combination of the two processes to release energy in an explosive way. Atomic bombs are the conventional name for fission weapons. Fusion weapons are also known as thermonuclear bombs or, more popularly, hydrogen bombs; they are nuclear weapons that release at least some of their energy through nuclear fusion. Nuclear weapons have a tremendous amount of explosive energy. The invention of the terms kiloton (1,000 tons) and megaton (1,000,000 tons) to characterize their explosion energy incomparable weights of the traditional chemical explosive TNT exemplifies their significance. The atomic bomb unleashed on Hiroshima, Japan, in 1945, for example, contained just roughly 64 kg. but after that insider's world rethink about nuclear power now mostly in the state of the power of the nation.