Nuclear fission is the splitting of a heavy atomic nucleus into lighter nuclei, releasing energy and neutrons that can cause a chain reaction. Nuclear fusion is the combining of two or more light nuclei to form a heavier nucleus, also releasing a large amount of energy. While fission is currently used in nuclear power plants, fusion is found naturally in stars and is a future target for clean energy production due to its higher energy output. Nuclear Fission Process: A heavy, unstable nucleus (l