Includes a simple view of ionic bonding and the way you need to modify this for A-level purposes.
Explains what electronegativity is and how it varies around the Periodic Table. Describes and explains how electronegativity differences determine the type of bond formed. Looks at polar bonds and molecules.
van der Waals forces
A description of van der Waals forces (temporary fluctuating dipole and dipole-dipole interactions) causing attractions between individual molecules.
An explanation of how hydrogen bonding arises and its effect on boiling points.
Bonding in organic compounds
This leads you to the bonding menu in the organic section of this site in case you are only interested in bonding in organic compounds.