The Covalent Bond is the bond found usually between non-metals, but can occur between non-metals and metals. It is the result of constructive interference between the valence or outer shell electrons. This interference creates an are of high probability for the electrons and hence creates an area of high electronegativity, which in turn attracts the two nuclei towards itself, forming the bond. And thus for many covalent bonds this results in uneven distribution of charge, creating dipoles which allow for hydrogen bonds. This is the case in water.

Covalent bonding is successfully described with quantum physics, and the quantum model of the atom, unlike rutherfords solar system analogy or bohrs model.