View the approximate locations of electrons in valence shells 1s through 4f.

Adjust amounts of ionic charges in this simulation to see how water molecules react to polar substances in solution.

Watch an animation of atoms and molecules colliding that shows how these particles combine during chemical reactions. Change levels of energy to see how reactions are affected.

View this collection of simulations to gain a better understanding of how chemical reactions happen.

Observe a visual representation of the equilibrium of products and reactants in chemical reactions. Record data while the reactions are taking place and print out a report afterwards.

Explore the purpose of catalysts in chemical reactions and how they affect the reaction pathways.

View this simulation to observe the process of smaller particles moving through a semipermeable membrane. Temperature is adjustable. [Must download the simulation to engage in the activity]

Adjust the strength of interatomic interactions in this virtual bullet experiment. Observe how the adjustments in strength affect the material in the experiment.

Adjust variables in this shock wave propagation simulation. Observe the density and pressure waves.

Adjust the incident ion variables in this simulation to observe the sputter yield from the target.

Observe how molecules can be sorted in a hypothetical nano conveyor-belt mechanism.

Use these virtual vapor pressure experiments to learn more about gases' reactions in various scenarios.

Adjust frequency, amplitude, and perturbation in this simulation to graph the trajectory of a mass at the end of each pendulum.

In this activity, students construct models of molecules using marshmallows and gum drops.

View a 3-D model of olestra, and compare it to a similar structure of a triglyceride. Also see the molecules that make up olestra. All compounds can be manipulated and studied from every angle.

See how gas, liquid, and solid molecules react to external pressure in this simulation. Also see a model of intermolecular motion through elliptical particles.

Read about the structure of RNA, its components, and how they fit together. This source includes visual aids to help you and a list of the different kinds of RNA and their functions.

A molecular model of a gas is introduced and explained. Assumptions behind the ideal gas law are presented. The ideal gas law is stated. Charles' law and Boyle's law are derived from the ideal gas law.

This cellular biology page presents extensive detail on the chemical nature of the cell membrane. Using the Chime plug-in, students can manipulate and study models of the membrane.

Great site which gives the chemical structure and reactions involved in aspirin production. If you have the CHIME plug-in then it links to a better site with a 3-D model you can manipulate. OR BETTER YET, if your browser has Java, then...

Observe the animated model to see DNA being replicated.

Learn more about fluid mechanics and dynamics concepts through these animations.

Students can use these simulations to understand concepts in electromagnetism. Simulations are available on the following concepts: Lorentz Force, The Hall Effect, capacitor, conductor, transistor, cyclotron, static electricity....

A collection of simulations to show the important topics of quantum physics.