Lecture 7 - Chem 4A F2008 Lecture 07: Spin Pauli Chem...

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Unformatted text preview: Chem 4A F2008 Lecture 07: Spin Pauli Chem Multi-Electron Atoms 9/10/2008 Energy Levels n ∞ 3 2 Ionized E 0 -R∞ -R∞ 4 9 ℓ=0 3s 2s ℓ=1 1 ℓ=2 -2 -1 0 1 2 mℓ=-1 0 3p 3p 3p 2p 2p 2p 3d (5 orbitals) 1 Ground -R∞ 1s Notation: nℓmℓ L7-1 © 2008 A. Pines M. Kubinec Electron Spin, Magnetism Spin Little Magnet N Quantized Spin Q.M. Classical Q.M. ms=-1/2 “Spin Down” Down” ms=1/2 “Spin Up” Up” S Electron 4 Q.N.s © 2008 A. Pines M. Kubinec n, ℓ , mℓ , ms L7-2 Spin, Polarization Filters © 2008 A. Pines M. Kubinec L7-3 © 2008 A.Pines M.Kubinec 1 Chem 4A F2008 Lecture 07: Spin Pauli Chem Multi-Electron Atoms 9/10/2008 No two electrons can have have the same set of Quantum Numbers Pauli Exclusion Principle n, ℓ , mℓ , ms n, Hund’s Rule: Degenerate Orbitals © 2008 A. Pines M. Kubinec Bosons Parallel Spins L7-4 Electronic Configurations Atom 1s 2s 2p 3s Config. Config. Magnetism H He Li Be B © 2008 A. Pines M. Kubinec 1s1 1s2 1s22s1 1s22s2 1s22s22p1 + 0 + 0 + L7-5 Atom 1s 2s Electronic Configurations 2p 3s Config. Magnetism Config. C N O F Ne © 2008 A. Pines M. Kubinec 1s22s22p2 ++ 1s22s22p3 +++ 1s22s22p4 1s22s22p5 1s22s22p6 [Ne]3s1 ++ + 0 + L7-6 Na © 2008 A.Pines M.Kubinec 2 Chem 4A F2008 Lecture 07: Spin Pauli Chem Multi-Electron Atoms 9/10/2008 ChemQuiz© 7.1 © 2008 A. Pines M. Kubinec L7-7 ChemQuiz© 7.2 © 2008 A. Pines M. Kubinec L7-8 ChemQuiz© 7.3 © 2008 A. Pines M. Kubinec L7-9 © 2008 A.Pines M.Kubinec 3 Chem 4A F2008 Lecture 07: Spin Pauli Chem Multi-Electron Atoms 9/10/2008 ChemQuiz© 7.4 © 2008 A. Pines M. Kubinec L7-10 © 2008 A.Pines M.Kubinec 4 ...
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