A tutorial on covalent bonds and intermolecular forces. A good summary weak forces, including Van der Waals forces and an excellent illustration showing the relative strengths of different forces and bonds.

Irving Langmuir (1881-1967), chemist who won the Nobel Prize in 1932 for work on the chemistry of surfaces and monomolecular layers, and worked on the theory of electron pair bonding following N.G. Lewis.