Final answer:
Nuclear fission is a process where an atom's nucleus splits into smaller nuclei, releasing energy.
Explanation:
Nuclear fission is a nuclear reaction where the nucleus of an atom splits into smaller nuclei, releasing a large amount of energy, free neutrons, and gamma rays. This process involves breaking down large nuclei into smaller ones, often with the release of excess neutrons.
Learn more about Nuclear fission here:
https://brainly.com/question/29141330
