Explore atomic structure and isotopes by building atoms with protons, neutrons, and electrons in this interactive simulation.

Build an atom using protons, neutrons, and electrons, and observe changes in element, charge, and mass with this interactive simulation.

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!

Create atoms with protons, neutrons, and electrons using this interactive simulation to explore changes in element, charge, and mass.

How did scientists figure out the structure of atoms without looking at them? Try out different models by shooting light at the atom. Check how the prediction of the model matches the …

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 …

How did scientists figure out the structure of atoms without looking at them? Try out different models by shooting light at the atom. Check how the prediction of the model matches the …

‪Build a Molecule‬

Explore interactive simulations to understand hydrogen atom models and how light interacts with atoms, enhancing your knowledge of atomic structure.

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 …