CHEM 1151 Lecture Notes - Lecture 12: Magnetic Quantum Number, Bohr Model, Atomic Orbital
28 Nov 2016
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Document Summary
Most of mass of atom and all of positive charge in center. Magnitude of positive charge different for different atoms and approx. half of atomic weight. Electrons outside nucleus balance charge on nucleus. It has a dual nature (photoelectric effect: wave explains physical properties of light itself, particle (photon) explains how light interacts with matter. Visible light is a small portion of the em radiation spectrum that humans see. There are two components to electromagnetic radiation, an electric field and magnetic field. Em can be de scribed as a wave traveling through space. Amplitude is the size or height" of a wave. Frequency, f, is the no. of cycles of the wave passing a given point per second (hz) Light as a particle light is a stream of energy packets (photons) Photon has a discrete energy where h is planck"s constant (6. 63x10-34 js) Only discrete energies of light are absorbed by matter, i. e. , light is quantized.
