CHM 1046 Lecture Notes - Lecture 35: Cathode Ray, Atomic Number, Uncertainty Principle
Document Summary
Every compound is formed of elements combined in specific ratios. Thompson discovered electrons because these bent towards positively charged plate in a discharge tube cathode rays. Rutherford sent these through gold foil alpha particles. The least massive particles in the atom electrons. The most massive particle in the atom neutron. He developed the idea of principle energy levels. When all electrons are at the lowest energy level ground state. Released quantities of energy from an atom are called photons photons massless light particles. De broglie said electrons act like waves and particles. It is impossible to know both the energy and the position of an electron at the same time. Levels in which electrons orbit the nucleus of an atom principle energy levels. No two electrons in an atom can have the same 4 quantum numbers. These are determined by the energy of electrons in the ground state quantum numbers.
