👉 Redox is a chemical term used in chemistry to describe substances that are capable of oxidation and reduction. It refers to two elements whose oxidation states differ by exactly 1, such as H2O (oxygen) and Fe2+ (iron). Oxidation is the process of reducing an atom or molecule, while reduction occurs when an atom gains electrons. Redox reactions can occur in a variety of chemical processes, including combustion, rusting, and oxidation of organic compounds.