When a uranium-235 atom is split, it typically produces two daughter nuclei, an average of 2.5 neutrons, and a large amount of energy. Krypton and barium are two of the most common daughter nuclei. Immediately after the division of the parent nucleus, the particles of the daughter nuclei rearrange themselves to achieve stability. This rearrangement creates new bonds between particles, resulting in a mass defect and release of energy. Similarly, when lighter nuclei fuse together in a fusion reaction, the new bonds between the particles also lead to a mass defect and energy release. In both cases, the energy released is due to the fusion of nuclear particles.

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