Sodium oxide is a chemical compound with the formula Na₂O. It is used in ceramics and glasses. The compound is the base anhydride of sodium hydroxide; when water is added to sodium oxide, NaOH is produced. Na₂O + H₂O → 2 NaOH The alkali metal oxides M₂O crystallise in the antifluorite structure.

What is the oxide formula for sodium?

Sodium oxide | Na2O - PubChem.

Why is Na2O called sodium oxide?

Sodium oxide molecules are made up of two sodium cations and one oxygen anion. Thus, Na2O molecules feature two sodium-oxygen ionic bonds.