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Unformatted text preview: 100 Chemistry 1A F11 10.12.11 Dr. Shaka Course Code 40000 Wave/Particle Duality • Macroscopic objects have extremely small wavelengths, much smaller than the nominal size of the particle; they are “sharp” and behave just like we expect them to do. • However, the wavelength of an electron can be 10,000 times the diameter of a hydrogen atom; “the electron” slips around like a wave, going through both slits in the double slit experiment, diffracting off a crystal lattice, and generally being much more puzzling for a classical mind to understand. 101 Chemistry 1A F11 10.12.11 Dr. Shaka Course Code 40000 Atomic Orbitals • Electrons in unperturbed atoms form standing waves that must fit into the space. • These 3D standing waves are called orbitals . • As orbitals are waves, parts of the orbital can be positive or negative, like any wave. • The phase does not mean positive or negative charge, but just the algebraic sign of the wave. • We can represent the phase with color. • A standing wave will have nodes , that is, 101 Chemistry 1A F11 10.12.11 Dr. Shaka Course Code 40000 Atomic Orbitals • Electrons in unperturbed atoms form standing waves that must fit into the space....
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- Fall '01
- Chemistry, Dr. Shaka, Chemistry 1A F11