The process of ___ is when two atoms combine to form a larger atom, releasing energy.

Nuclear fusion reaction

Explanation:

Nuclear fusion is defined as the process by which two lighter atoms combine together to form a larger and a denser atom, and during this process, it generates a large amount of energy. For example, the sun and the stars undergo this process of fusion, where two hydrogen atoms unite to form helium, and in doing so, a large amount of energy is released in the form of light.

This nuclear energy obtained from nuclear plants is mainly used to make weapons and others.

It requires a comparatively lesser amount of fuel in comparison to the nuclear fission reaction.

The process of nuclear fusion is when two atoms combine to form a larger atom, releasing energy.