Question

Criss cross valency of calcium oxide

Answer 1

Please mark me as brainlist.
sorry it should be CaO

Answer 2

The criss cross valency of calcium oxide is $CaO$.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

For formation of calcium oxide ,Ca will form $Ca^{2+}$ having an oxidation state of +2 and $O^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $CaO$

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