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Why does Carbon form compounds mainly by covalent bonding?

Why does Carbon form compounds mainly by covalent bonding?

Answer.  Being tetravalent carbon atom, it is neither capable of losing all of its four valance electrons nor it can easily accept four electrons to complete its octet. Both of these are requirements of ionic bond formation and are energetically less favourable. Carbon completes its octet by sharing of electrons and hence covalent bonding is preferred.
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