Covalence of central atom is maximum in
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Answer. Elements which have vacant d-orbital can expand their octet by transferring electrons, which arise after unpairing, to these vacant d-orbital e.g. in sulphur. . Thus an element can show a maximum covalency equal to its group number e.g. chlorine shows maximum covalency of seven
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Elements which have vacant d-orbital can expand their octet by transferring electrons, which arise after unpairing, to these vacant d-orbital e.g. in sulphur. . Thus an element can show a maximum covalency equal to its group number e.g. chlorine shows maximum covalency of seven.
ANSWER
First, note that covalency = number of bonds formed.
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