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?

Respuesta :

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.