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Why is it possible for an oxygen atom to form a double covalent bond, but its not possible for a chlorine atom to form a double covalent bond?

Sagot :

In a double covalent bond, it is when 2 atoms share 2 pairs of electrons. Chlorine can't form a double because it only has one free valence electron which means it can't make two pairs, one one while the oxygen can. Compare and contrast Covalent, Ionic, and Metallic bonds.