Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change.

Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas!

Build molecules from atoms, view them in 3D, and explore molecular structures with this interactive simulation.

Build an atom with protons, neutrons, and electrons to understand its element, charge, and mass.

Learn to build molecules from atoms, view them in 3D, and understand molecular structures with this interactive simulation.

Starting from atoms, see how many molecules you can build. Collect your molecules and view them in 3D!

Build and test circuits with batteries, resistors, light bulbs, and switches. Learn about series and parallel circuits, Ohm's law, and conductors and insulators.

Build a nucleus from protons and neutrons, explore radioactivity and stability, and learn about nuclear science with this interactive simulation.

Costruisci un atomo partendo da protoni, neutroni, ed elettroni, e osserva come cambiano elemento, massa e carica. Gioca una partita per verificare le tue idee!

Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education <a {{0}}>research</a> and engage students through an intuitive, game-like environment where students learn through exploration and discovery.