Covalent bond and bond energies : guide for writing Lewis structure : homo-nuclear and hectro-nuclear bond energies : homo-nuclear and hectro-nuclear bond  lengths : the prediction of structures and reactions from bond energies : shapes and polarities of molecules : valence shell electron pair repulsion; hybridized orbitals; bond polarity;percentage ionic character  ironic bonding and solid sate; the formation of free ions ; electro static energies; co valence in ionic crystals; ionic lattices based on cubic geometries; ionic radii; some ternary systems;   defect and non-stoichometric lattices ; acid based chemistry; inorganic chemistry non aqueous solvents