Forces on Multiple Charges
In this movie, you see three positive charges near each other. The electrostatic force (labeled as FE) from each of the other two charges is shown on each charge. Notice how the forces are large when two charges are near each other but get smaller as they move apart.
In this simulation you see two positive charges with one negative charge in between them. Notice how the closer the charges get, the stronger the forces become. The vibration that you see at the end of the simulation (looks like a bird flapping its wings) is very similar to the vibration of water molecules. In the case of the water molecule, the blue would be Hydrogen ions and the green would be the Oxygen ion.