Not the same oxygen!

Chemistry Level pending

Consider three compounds KO 2 , BaO 2 \text{KO}_{2}, \text{BaO}_{2} and TiO 2 . \text{TiO}_{2}. Each contains two oxygen atoms per metal atom. However, the oxygen occurs in different forms in the three compounds.

What is the correct order of the ionic valency of each metal ion?

TiO 2 > KO 2 > BaO 2 \text{TiO}_{2} > \text{KO}_{2} > \text{BaO}_{2} KO 2 > BaO 2 > TiO 2 \text{ KO}_{2} > \text{BaO}_{2} > \text{TiO}_{2} KO 2 > TiO 2 > BaO 2 \text{KO}_{2} > \text{TiO}_{2} > \text{BaO}_{2} BaO 2 > KO 2 > TiO 2 \text{BaO}_{2} > \text{KO}_{2} > \text{TiO}_{2}

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