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Build a Molecule


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PhET Interactive Simulations
University of Colorado Boulder


  • Atoms
  • Molecules
  • Molecular Formula


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

Sample Learning Goals

  • Describe the differences between an atom and a molecule.
  • Construct simple molecules from atoms.
  • Recognize that the subscript in the molecular formula indicates the number of that atom in the molecule.
  • Recognize that the coefficient indicates the total number of molecules.
  • Associate common molecule names with multiple representations.
Version 1.03