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In the so-called "hydrogen bomb" or fusion bomb, yes, there is energy released from the same reaction (hydrogen fusing to helium) as in the Sun.

However, many if not most atomic bombs are fission bombs that do not involve fusion. In a fission bomb, the nuclei of uranium atoms are split, converting some of their mass to energy.

All current fusion bombs include fission reactions to trigger the greater energy release from fusion. But most of the energy in very large fission-fusion bombs comes from a third-stage reaction: the fusion causes an exceptionally powerful fission reaction in a uranium shell around the bomb. This called a Teller-Ulam device or fission-fusion-fission bomb.

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11y ago

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