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ATOMIC BOMB
A weapon with a bigexplosive strength due to the sudden release of energy when the nuclei of hard atoms such as plutonium-239 or uranium-235 are split.
This fission is brought about by the bombardment of the fuel with neutrons, settingoff a chain reaction. The bomb releases shock, blast, heat, easy, and lethal radiation. The world's firstatomicbomb was successfully tested by the United States on July 16, 1945.