When oxygen and calcium form an ionic bond, what is the formula? o2ca2 oca ca2o2 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.  

Here calcium is having an oxidation state of +2 called as cation and oxide 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 .

The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

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tony (lordcaos066)

2b2t

explanation:

2b2t