What causes energy to be released in a nuclear reaction?
A. Loss of atoms.
B. Atomic fusion.
C. Atomic fission.
D. Both fusion and fission.
E. Electrical charge.
Atomic fusion is the process of combining atoms to form elements of higher atomic weight. Often large amounts of energy is released during this process. Meanwhile, atomic fission is the process of splitting an atomic nucleus. This results in the release of large amounts of energy as well.