In a nuclear fission process, what happens to the nucleus of an atom?

Nucleus ejects protons.

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Nucleus shed its electrons.

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A heavier nucleus is broken into lighter nuclei.

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Lighter nuclei fuse together to form heavier nucleus.

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Solution

The correct option is C A heavier nucleus is broken into lighter nuclei.
In the nuclear fission reaction, the nucleus of a heavier atom (such as uranium, plutonium or thorium), when bombarded with low energy neutrons, can be split apart into lighter nuclei. When this fission happens a large amount of energy is released. This energy is then exploited in the production of electricity.

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