
Nuclear Weapon. A nuclear weapon is an explosive device that produces destructive force from reaction of nuclear by fission or a combination of fusion and fission. Only from relatively small amounts of matter, both reactions release vast quantities of energy. Approximately, amount of 20,000 tons of TNT energy was released by the first fission bomb test. Meanwhile, the same amount of energy as approximately 10,000,000 tons of TNT was released by the first thermonuclear bomb test.