GENERAL KNOWLEDGE

Detailed explanation-1: -Fusion powers stars and produces virtually all elements in a process called nucleosynthesis. The Sun is a main-sequence star, and, as such, generates its energy by nuclear fusion of hydrogen nuclei into helium.

Detailed explanation-2: -Nuclear fusion is a process in which light-mass nuclei combine to form a heavier and more stable nucleus. Fusion produces even more energy than fission.

Detailed explanation-3: -An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom’s nucleus may result from an excess of either neutrons or protons.

Detailed explanation-4: -Answer and Explanation: Nuclear fission occurs when a large and unstable nucleus splits apart into smaller, more stable nuclei. A nucleus is made up of protons and neutrons. These protons and neutrons are held together by strong nuclear force.