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"Great things are done by a series of small things brought together."
– Vincent Van Gogh



See our online video demonstration of the "Atoms In Motion" app running on an iPad simulator.

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" .. all things are made of atoms—little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another."

Richard Feynman ‑ Lectures on Physics

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Explore the states of matter using 4 noble gases atoms (helium, neon, argon, and krypton). Create solids, liquids, and gases by varying the simulation temperature, volume, and atomic composition.

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Perform sophisticated molecular dynamics experiment to uncover the ideal gas laws. Graphs update dynamically depending on the changing parameters within the simulation.

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Create large simulations, nanoparticles, and small clusters. Perform your own experiments on atomic and thermal diffusion by dragging atoms and throwing them within the simulation. Don't forget to save states so you can repeat your experiments!

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The accompanying chapter on the science behind the simulation covers everything from the "Size of Things" to "The Ideal Gas Law", and even includes detailed descriptions of interatomic forces and molecular simulation.

Size of Atoms

From Apples to Atoms. An ordinary apple would need to be magnified 100 million times before you could see an atom! In each of the above panels the images are zoomed from an apple to a lady bug, then to pollen and eventually to individual atoms. The atoms are not clearly visible until the highest magnifications.