SEARCH Articles Figures Tables Are the Failures of Valence Bond Theory Real Electronic Theory of Valency, The The Modern Theory of Valency The Molecular Orbital-Valence Bond Theory of Excited States The Nature of Chemical Bonds Valence Bond Theory The Shapes of Molecules Valence Shell Electron-Pair Repulsion Theory The valence-bond theory The valence-bond theory of metals Theorems of the Bond Valence Theory Valence theory Valency theory