Metal and Alloys

Why is sodium oxide Na2O and not NaO?

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Wiki User
04/23/2012

Sodium oxide is Na2O and not NaO, because it has 2 elements of sodium (Na). therefore making it Na2O instead of NaO

The reason why it's Na2O and not NaO is because Oxygen whilst in a compound has an oxidation state of 2-, while Sodium has an oxidation state of 1+. Therefore to give an overall value of 0 to the compound, you need two Sodium atoms joined to only one Oxygen atom.