PH 122 Lecture Notes - Hydrogen Bond, Electric Field, Atomic Orbital
Document Summary
All matter is made up of charged particles. There are two types of charge, + and -. We usually describe the electric force in terms of the electric field. For now, this is a convenient tool, but we"ll see that the electric field is real. All excess charge stays on the surface and the field is zero inside. Rub a plastic rod with a piece of wool. Negative charges are immobile on the rod"s surface. The positive charge on the wool is equal to the negative charge on the rod. Charge is transferred to a piece of metal upon contact. Charge spreads over the surface of the metal very fast. An electrically neutral molecule + friction positive molecule ion + negative molecular ion. The positive half of the molecule lost an electron as the bond broke. The negative half of the molecule gained an extra electron as the bond broke.