Chemical Bonds in Molecules Are Covalent but Not Ionic.
We report a comprehensive bonding analysis of the nonpolar bonds H-H, Li-Li, and F-F and the polar bonds Li-H, H-F, and Li-F as well as the isoelectronic dications HeNe2+, BeHe2+ and BeNe2+. We also analyze the chemical bonds in the heavier halogen systems EF and ECl (E = Na-Cs). It is shown that the bonding interactio...