The interactive periodic table everyone ends up linking to. Drag the temperature slider to watch the elements melt and boil, or switch to orbitals, isotopes and compounds.
An interactive periodic table with 3D atom models, electron shells and properties for all 118 elements.
Spin 3D models of atoms and molecules and watch electrons, orbitals and bonds animate as you explore the periodic table.
Hundreds of physics, chemistry and biology simulations you can poke at — drag a mass onto a spring, mix a solution, build a circuit and watch it burn out.
Free dynamic mathematics software for geometry, algebra, statistics and calculus, all in-browser.
Zoom continuously from the Planck length to the observable universe. Still stunning years later.
Type the reactants and it predicts the products and balances the equation, with the steps shown.
