CK-12 Foundation
Ck 12: Polarity and Intermolecular Forces
[Free Registration/Login may be required to access all resource tools.] The following online tutorial describes how the electronegativity difference between two atoms in a covalent bond results in the formation of a nonpolar covalent,...
Davidson College
Davidson College: Valence Shell Electron Pair Repulsion (Vsepr) Model
Presents examples of molecules that do not match the expected bond angles in the Valence-Shell Electron-Pair Repulsion Model. Requires Java.
CK-12 Foundation
Ck 12: Plix: Solute and Solvent
[Free Registration/Login Required] While paying attention to the charges, move the salt ions and water molecules around to simulate how salt ions are dissolved in water.
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...
State University of New York
State University of New York: Determining Molecular Polarity
The following module illustrates a method for determining if a molecule is polar or nonpolar.
CK-12 Foundation
Ck 12: Plix: Molecular Formula
[Free Registration/Login Required] In this interactive you will move the end of each arrow to connect the label with the correct model of each molecule. You will need a sign-in to access this media, but it will be well worth your time!
CK-12 Foundation
Ck 12: Plix Series: Gas Mixture and Molecular Speeds
[Free Registration/Login Required] Hike to the top of Mt. Everest and observe what happens to the amount of molecules pushing down on the surface of the Earth. After the activity, answer one challenge question about the topic.
CK-12 Foundation
Ck 12: Plix Series: Endothermic Reactions: Combustion Reactions
[Free Registration/Login Required] Use the water and carbon dioxide molecules to balance the combustion reactions, label them, and then answer one challenge about the topic.
CK-12 Foundation
Ck 12: Plix: Structure of Water: Phases of Matter
[Free Registration/Login Required] Explore this interactive by dragging the red dots to match each physical state of water with the correct picture of its molecules.
Wikimedia
Wikipedia: Plane of Symmetry
This site from the free encyclopedia, Wikipedia, provides a basic definition for plane of symmetry. Links are given for additional information on related subjects.
Wolfram Research
Wolfram Science World: Valence Shell Electron Pair Repulsion
Good site includes the basics of arrangement, hybridization, and gemetry.
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!