Molecule Polarity Simulation:
https://phet.colorado.edu/sims/html/molecule-polarity/latest/molecule-polarity_en.html
https://phet.colorado.edu/sims/html/molecule-polarity/latest/molecule-polarity_en.html
Molecule Shapes Simulation:
https://phet.colorado.edu/sims/html/molecule-shapes/latest/molecule-shapes_en.html
https://phet.colorado.edu/sims/html/molecule-shapes/latest/molecule-shapes_en.html