2.1 The ionic (electrovalent), covalent and co-ordinate (or dative) bond
2.2 Polar covalent bonds and electrical dipoles in molecules
2.3 Nature of forces in bonding
2.4 Delocalisation of electrons
2.5 Metallic bonding
2.6 Lattice structures of NaCl and CsCl as typical ionic solids
2.7 Shapes of molecules and ions
2.8 Molecular crystals and macromolecular structures