What is Reduction? Reduction is a process that involves the addition of hydrogen or any other electropositive element or the removal of oxygen or any other electronegative element, according to classical or older concepts. Process through which an atom or an ion gains one or more electrons is known as reduction, according to the electronic concept. Oxidant Oxidant, also known as an oxidizing agent, is a substance that can accept electrons. Examples of Oxidants In periodic table, molecules of ele