is about is about atom electronic descriptor oxidation state Oxidation state is an atomic descriptor that gives the degree of oxidation of an atom in terms of counting electrons. The higher the oxidation state (OS) of a given atom, the greater is its degree of oxidation. [source: IUPAC Gold Book - https://doi.org/10.1351/goldbook.O04365] https://doi.org/10.1351/goldbook.O04365