SEARCH Articles Figures Tables A Combined Valence Bond and Molecular Orbital Theory Approach to Covalent Bonding Bond theory Bonding theory Bonds valence bond theory Covalent bonding theory Covalent bonds valence bond theory and Use of Molecular Symmetry to Generate Covalent Excited States Based on Valence Bond Theory Valence bond theory Valence bond theory covalent configuration Valence bond theory covalent/ionic resonance Valence theory Valency theory