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The U.S. use nuclear bombs during World War ll to bomb Hiroshima and Nagasaki after Japan refused to surrender.
nuclear bombs
H. G. Wells in his 1914 novel "The World Set Free" was the first to publish on the use of nuclear bombs in a war, he was the first to use the term atomic bomb to refer to bombs that obtain their energy from inside the atom (rather then from chemical reactions between atoms/molecules).Note: H. G. Wells atomic bombs were not based on using nuclear fission or nuclear fusion (as the real bombs are), as the nucleus of the atom had not yet been discovered and neither nuclear fission nor nuclear fusion had been discovered. As the only method of releasing the energy of the atom known at the time was radioactive decay, H. G. Wells based his atomic bombs (and atomic engines) on a hypothetical method of "accelerated radioactive decay".
d Two Nuclear Bombs, one on Hiroshima, the other on Nagasaki
The conventional bombs are the non-nuclear ones. They use a exotermic chemical reaction to obtain a sudden release of great amount of energy. In such weapons, nuclear fission and fussion are not significant source of energy, and radiocativity is not used as part of its offensive power. Regards, Mario/Brazil