In this section we are dealing with two types of charges: protons and electrons. Protons are bound tightly in the center of an atom, but electrons can sometimes leave their atoms. The two types of charges interact in specific ways. Charges that are the same repels each other while charges that are different attracts each other. The reason is because they have different types of charge. A positive charge is shown with a (+) sigh as the negative charge is shown with a (-) sign. Just as magnetic poles exert their forces over a distance, so do electric charges. …
