• Falstad offers this illustration of the energy levels of the hydrogen atoms, which allows you to switch the view between the Bohr and Dirac models within a single active diagram


  • The PhET model hydrogen atom lets you compare different historical models of the atom to simulated experimental results


  • Andrew Duffy’s Emission Spectra simulator lets you compare the hydrogen spectrum with other visible spectra side-by-side with the full white light spectrum, for orientation


  • Tom Walsh's simulation lets you select individual transitions and view the resulting energy


  • This more complex Falstad simulator lets you display the wave functions/orbitals in either real or complex modes, and to take slices along the axes as well as viewing them in three dimensions, potentially valuable for upper level courses analyzing orbital structure.


  •  This mathematical demonstrator from Wolfram graphically shows solutions for the hydrogen atom in curved space