Editing Oxide (section)

==Nomenclature and formulas==
The [[chemical formula]]s of the oxides of the [[chemical element]]s in their highest [[oxidation state]] are predictable and are derived from the number of [[valence electron]]s for that element. Even the chemical formula of O<sub>4</sub>, [[tetraoxygen]], is predictable as a [[group 16 element]]. One exception is [[copper]], for which the highest oxidation state oxide is [[copper(II) oxide]] and not [[copper(I) oxide]]. Another exception is [[fluoride]], which does not exist as one might expect—as F<sub>2</sub>O<sub>7</sub>—but as [[oxygen difluoride|OF<sub>2</sub>]].<ref>{{cite journal|doi=10.1021/ed082p1649 |title=Fully Exploiting the Potential of the Periodic Table through Pattern Recognition|author=Schultz, Emeric|journal= J. Chem. Educ. |year=2005|volume=82 |issue=11|page=1649|bibcode = 2005JChEd..82.1649S }}</ref>