Answer :
Final answer:
The fuel used by the first nuclear weapons was Uranium-235.
Explanation:
The fuel used by the first nuclear weapons was Uranium-235.
Uranium-235 is an isotope of uranium that can undergo fission, a process in which the nucleus of an atom splits into two smaller nuclei, releasing a large amount of energy. This released energy is what powers a nuclear explosion in a bomb.
Uranium-235 was used as the fuel in the first atomic bomb, called Little Boy, which was dropped on Hiroshima, Japan, during World War II.
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