Wolfram Research
Wolfram Science World: Valence Shell Electron Pair Repulsion
Good site includes the basics of arrangement, hybridization, and gemetry.
Michael Blaber, PhD
Florida State University: Molecular Geometry and Bonding Theories
This article from the Florida State University contains information on multiple bonds and orbitals. Great charts and pictures are shown to help the educational process. Definitely a great site to check out on the subject.
Other
Time Domain Cvd: Hybrid Orbitals and Complex Molecules
Good look at the orbital hybridization that goes along with the different arrangements of electron clouds. Solid information and graphics.
Other
Mark Bishop: Hybrid Orbitals
Cool visual site that shows a 3-D image of the various hybrid orbitals that are possible. Requires the CHIME plug-in to view images.
Other
Monterey Peninsula College: Molecular Orbital Theory
Very deep presentation of molecular bonding and orbital theory. Nice graphics and text make it a good presentation of some high end material.
University of Waterloo (Canada)
University of Waterloo: Valence Bond Theory and Hybrid Atomic Orbitals
Provides good objectives to go along with a text discussion of hybridization. Complete with illustrations, charts, and graphics.
University of Waterloo (Canada)
University of Waterloo: Vsepr Models
The University of Waterloo provides background in pair repulsion and confidence building questions. Try this one once you think you know what you are doing!
Michael Blaber, PhD
Florida State University: Basic Concepts of Covalent Bonding: Covalent Bonding
Good introduction and graphics make this a solid page for understanding the orbital role in bonding and molecular geometry. The author is a professor at Florida State University.
University of Kentucky
University of Kentucky: Hydrogen Like Orbitals
Good site for viewing atomic orbitals. Click on an energy level and you get a simulated three dimensional image of the orbitals.
Other
Monterey Peninsula College: Pi Bond
Monterey Peninsula College faculty page simply shows a 3-D image of a Pi bonding orbital. Requires the CHIME plug-in
Other
Washinton University: Vsepr
This site from the Department of Chemistry at Washington University is a nice site in that it gives you a graphical look at the arrangement of electron pairs. The plug-in CHIME will let you see the 3-D molecules, but it is good even if...