Interactive Simulators
Learn by doing! These simulators use models that are backed by data from experiments. You get a chance to see what happens as you change things. Play around, and follow your curiosity.
Featured Tools
beginner
Atom Builder
This simulator features the Bohr model. See how an element changes as you add protons, neutrons, and electrons.
Open simulator intermediate
Isotope Explorer
See how alchemy works. Push atoms through transformations.
Open simulator intermediate
Quantum Atom Builder
Same controls as the Bohr-model builder, but electrons appear as overlapping probability clouds instead of orbiting points.
Open simulator advanced
Hydrogenic Orbital Viewer
Explore hydrogen-like orbital lobes and nodal structure in both 2D slices and 3D views, with preset selection and phase coloring.
Open simulator beginner
Hydro Power Plant
See how we use water to convert potential energy into electricity.
Open simulator beginner
Laminar Pipe Flow
The simplest model of fluid flowing smoothly through a pipe.
Open simulator