why barium peroxide is BaO2 and not Ba2O2?
Peroxide is O22- ion.
Barium has a charge of 2+,
When Ba combines with peroxide, the formula of compound is BaO2
Alkali metals have a charge of 1+ and need two atoms to combine with peroxide. e.g. Na2O2
Barium has a charge of 2+,
When Ba combines with peroxide, the formula of compound is BaO2
Alkali metals have a charge of 1+ and need two atoms to combine with peroxide. e.g. Na2O2