Monday, April 30, 2012
There are two types of electric charges, negative and positive. Positive charges repel each other. As do negative. Negative and positive charges attract, however. The particles that make up all matter, atoms, contain these charges. Atoms are composed, however, of even smaller particles. There are protons, positively charged, electrons, negatively charged, and neutrons, which do not have any charge. Protons and neutrons are in the center of the nucleus of an atom. Electrons move around these in various orbits. If the atom contains the same amount of electrons and protons, they cancel each other out and the atom is neutral. If not, it has an electric charge. An atom with a charge is called an ion. A negative ion has a negative charge, and a positive ion has a positive charge.
Electrons can be transferred between two objects. If two objects rub together, one looses electrons and the other gains. Now they both have a charge. Some objects are more likely to lose or gain electrons.