In this lesson our instructor talks about valence bonding theories. First he discusses spᶟ hybridization, sp² hybridization, and sp hybridization. Then he talks about molecular orbital theory. He ends the lesson with two helpful sample problems. Advanced Bonding Theories Valence bond theory can explain for observed bond angles via hybrid orbitals, but doesn’t always account for a compound’s magnetic behavior. MO theory is a delocalized bonding model, and views electrons as being distributed throughout the entire compound. An MO diagram can be used to predict magnetism and bond order for a molecule.