What is the maximum covalency of oxygen ? Give examples. – InterviewSolution

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1.	What is the maximum covalency of oxygen ? Give examples.
Answer» Solution :Oxygen usually forms two bonds. Its valency cannot be expanded DUE to lack of VALENCE d orbitals. However, the maximum COVALENCY of oxygen is three, due to an additional dative bond formed by oxygen using one of its lone PAIRS. Hydronium ion, `H_(3)O^(+)` has two COVALENT bonds and one coordinate covalent bond formed by oxygen atom. Oxonium ion, `(C_(2)H_(5))OH^(+)` also has three bonds formed by oxygen.

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