A chemical process in which there is a gain of electrons is known as?

A chemical process in which there is a gain of electrons is known as "Reduction". In simple terms, reduction is the process of adding electrons to a chemical species. This often results in the formation of a new substance with different properties than the original substance. The opposite of reduction is oxidation, which is the process of removing electrons from a chemical species. In reduction reactions, the species that gains electrons is referred to as the "reductant," while the species that loses electrons is referred to as the "oxidant." The transfer of electrons from the oxidant to the reductant results in a reduction in the oxidation state of the reductant and an increase in the oxidation state of the oxidant.