Models of the Hydrogen Atom help you to study atom structure. 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 experimental results.

Sample Learning Goals
1. Visualize different models of the hydrogen atom.
2. Explain what experimental predictions each model makes.
3. Explain why people believed in each model and why each historical model was inadequate.
4. Explain the relationship between the physical picture of the orbits and the energy level diagram of an electron.
5. Engage in model building.

Non-obvious controls:
1. In Experiment mode, a single Hydrogen atom is hidden behind the black box. In Prediction mode, the atom is visible. Students should be able to discover that only the predictions of the Schrodinger model match the results of an experiment.
2. Select Transitions in the Help menu to show the wavelengths needed for transitions in the Bohr, deBroglie, and Schrodinger models. If Light is set to Monochromatic, the wavelength slider flashes white when it is over a wavelength that could excite the electron from the ground state.
3. Use the camera icon to take a snapshot of the Spectrometer so that you can compare the patterns for different models.
4. Set the slider at the bottom to fast to build up the Spectrometer pattern quickly.
5. You can Pause the sim and then use Step to incrementally analyze.
6. If you are doing a lecture demonstration, set your screen resolution to 1024x768 so the simulation will fill the screen and be seen easily.

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this calculator software.