Covalent bond

Covalent bonding is the sharing of electrons by two atomic nucleii to produce attraction between both. This is the most stable form of chemical bonding.

Covalent bonding always occurs between non-metals?. The outer shell of electrons in both atoms are not full, so the atoms try to fill them by sharing electrons between two atoms:

[Dative covalent bonding]? occurs when one atom gives both of the electrons in the bond.

see also [bond sizes]?.