Jan 12, 2023 ·During anoxidation-reduction reaction, theoxidationnumber of atoms changes, and there is a transfer of electrons between two substances. The following is what happens to oxygen, hydrogen, and electrons duringoxidationversus reduction: Oxygen transfer –oxidationis a gain of oxygen; reduction is loss of oxygen. Theoxidationstate, also referred to as the amount ofoxidation, defines a chemical compound’s degree ofoxidation(loss of electrons) of an atom. Antoine Lavoisier first used the termoxidationto describe a substance’s reaction with oxygen. Oct 24, 2012 ·The meaning ofOXIDATIONis the act or process of oxidizing. Oxidationand reduction in terms of oxygen transfer The termsoxidationand reduction can be defined in terms of the adding or removing oxygen to a compound. while this is not the most robust definition, as discussed below, it is the easiest to remember.