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Unformatted text preview: 1 Lecture 10 Electron Configuration and the Periodic Table Beyond the Bohr Model: The Quantum Mechanical Model of the Atom 7.4 Quantum Numbers, Energy Levels, and Orbitals 7.5 Shapes of Atomic Orbitals 7.6 Atom Electron Configurations (I) 7.7 Lecture 10, Knowledge and Skills Know about and work with the wave nature of moving matter Know the meaning of the Heisenbergs uncertainty principle Know and work with Schrödingers wave mechanical model of the hydrogen atom (and other atoms) Know the meaning of the term electron orbital Know the quantum numbers, n, l, m l , m s Significance of quantum numbers Know the shapes of orbitals: s, p, d Know about the internal structure of orbitals (nodes) Know the relative orbital energies Know the Pauli exclusion principle Know Hunds rule Determine the electron configuration of many-electron atoms Beyond the Bohr Model: Quantum Mechanics De Broglie (1924): All moving moving objects act as waves ¡ = h mv ¡ = wavelength (m) h = Plancks constant (J s) m = mass (kg) v = velocity (m s-1 ) For photon: Einstein: E = mc 2 (m = mass of a photon) Planck: E = h ¡ = hc/ ¢ >> mc 2 = hc/ ¢ >> ¢ = h/mc Electrons move in atoms as standing waves Beyond the Bohr Model: Quantum Mechanics Schrödinger (1926): Treats e- as standing waves Developed by analogy to classical equations for the motion of vibrations Called wave mechanics or quantum mechanics The solutions provide energies and wave functions wave functions...
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