Chemistry 1027A/B Lecture Notes - Lecture 3: Matter Wave, Louis De Broglie, Unified Atomic Mass Unit
15 Mar 2015
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+ 8p 2m e - v h2 d 2y dx2. Approx. same mass as neutrons (equal to one atomic mass unit: neutron. Approx. same mass as protons (equal to one atomic mass unit: electron. 1/2000th of the mass of a proton and neutron e- has a certain amount of energy: ground state. Give e- energy: shifts to excited state. Excited ground state: energy has to be released in the form of light, electrons did not gain the same amount of energy as when they fell back to the ground state, they emitted different wavelengths. Discovered when hydrogen gas was placed in a tube and excited with a high-voltage electrical discharge, several colours of visible light were emitted (cid:230) (cid:231) (cid:246) (cid:230) (cid:231) (cid:246) (cid:230) (cid:231) (cid:246) Light is a part of the spectrum. Describes the range of electromagnetic radiation that travels through space as energy in the form of oscillating waves. Wavelength, , is the distance between two peaks.
