CHEM 14A Lecture Notes - Lecture 1: Centrifugal Force, Elementary Charge
Document Summary
Same atoms have the same size, same mass, same properties. Thomson studied how the cathode behaves when he pushes a high voltage. Cathode carries negative charge, anode carries positive charge. No matter what material used for cathode, the beam was the same; same charge/mass ratio. A universal piece that carries negative charge: electron. The fundamental charge can only be multiplied by full numbers. An atom is neutrally charged because the electrons" negative charge cancels out with a sea of positive charge. Discovery of the nucleus and the nuclear model of the. The majority of the alpha particles didn"t hit anything and just penetrated the foil. There must be a portion of the particle that is small but dense (nucleus)---only way alpha particles bounced back. Centrifugal force allows the atoms to move around the nucleus similar to how planets move around the sun. The bond between the protons and neutrons is really strong. A nature of light: young"s double slit experiment.
