L10S09 Spin,Pauli Principle, Electronic Configs 02-11-09

L10S09 Spin,Pauli Principle, Electronic Configs 02-11-09 -...

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Unformatted text preview: CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Edited by Foxit Reader Copyright(C) by Foxit Software Company,2005-2008 For Evaluation Only. Lab 3: Molecules and Light Goal: Determine how effective a sunscreen is at absorbing radiation by measuring the molar absorptivity (extinction coefficient) of the active ingredients. Tools and Skills: : UV-Vis absorption UVspectroscopy, Beer's Law, and dilution calculations. 2006Kubinec, Pines, Nitsche, UCB L10-1 2006Kubinec, Pines, Nitsche, UCB L10-2 Electronic Configurations Atom 1s 2s 2p 3s Config. Config. Magnetism fermions have half interger spins. electrons are fermions. something strip, has to spin twise to spin to the original orientation and side. H He Li Be B 2006Kubinec, Pines, Nitsche, UCB 1s1 1s2 1s22s1 1s22s2 1s22s22p1 + 0 + 0 + L10-3 fill parallel spin first and then antii- parallel spin. 2006 Kubinec, Pines, Nitsche, UCB 1 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Edited by Foxit Reader Copyright(C) by Foxit Software Company,2005-2008 For Evaluation Only. Atom 1s 2s Electronic Configurations 2p 3s Config. Magnetism Config. C N O F Ne 2006Kubinec, Pines, Nitsche, UCB 1s22s22p2 ++ 1s22s22p3 +++ 1s22s22p4 1s22s22p5 1s22s22p6 [Ne]3s1 ++ + 0 + L10-4 Na ChemQuiz 10.1 When an electron spin flips, for which of the flips, following is the energy not altered ? A) N 2004 M. Kubinec, A.Pines could be flipped up or down. 2s 1s 2p B) O C) F L10-5 ChemQuiz 10.2 Which species can have the electronic configuration [He]2s22p53s1 ? A) F - B) Na C) Na+ L10-7 + 2004 M. Kubinec, A.Pines 2006 Kubinec, Pines, Nitsche, UCB 2 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Ionization Energy (kJ) Summary 2500 2000 1500 1000 500 0 1s2 2p6 2p4 2p5 2p2 2p3 2p1 1s 2s 2s2 3s C N O F Ne Na L12-8 H He Li Be B A.Pines,M.Kubinec,UCB Electronegativity Zeff n - > 2.0 Ionic Na+Cl- - Electronegativity Partly Ionic ~ 0.4-2.0 H+Cl0.4Covalent Cl - Cl < 0.4 + 2006Kubinec, Pines, Nitsche, UCB Na ~0.9 H ~ 2.2 Cl ~ 3.2 A.Pines,M.Kubinec,UCB L12-10 L10-9 Dimitri Ivanovich Mendeleev's Mendeleev' First Rendition of the Periodic Table 2006Kubinec, Pines, Nitsche, UCB L10-10 2006Kubinec, Pines, Nitsche, UCB Dimitri Ivanovich Mendeleev Professor of Chemistry St. Petersburg University Founder of the Modern Periodic Table (1869) L10-11 2006 Kubinec, Pines, Nitsche, UCB 3 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Orbital Filling for Elements in the Periodic Table 2006Kubinec, Pines, Nitsche, UCB L10-12 Names for Groups in the Periodic Table 2006Kubinec, Pines, Nitsche, UCB L10-13 Names for Groups in the Periodic Table (cont'd) (cont' 2006Kubinec, Pines, Nitsche, UCB L10-14 2006 Kubinec, Pines, Nitsche, UCB 4 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" 2006Kubinec, Pines, Nitsche, UCB L10-15 Periodic Table Recommended by International Union of Pure and Applied Chemistry (IUPAC) 2006Kubinec, Pines, Nitsche, UCB L10-16 Ionization Energy, Electron Affinity X X + eM IE (kJ mol-1) EA (kJ mol-1) Na 496 -53 X+ + e- IE X EA K 419 -48 + e- Rb 403 -47 X IE (kJ mol-1) EA (kJ mol-1) Cl 1251 -349 Br 1140 -325 I 1008 -295 2006Kubinec, Pines, Nitsche, UCB L10-17 2006 Kubinec, Pines, Nitsche, UCB 5 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Alkali Metals in Water 2 M(s) + 2 H2O (s) Redox Reaction 2 M 2 M+ + 2 e+ - H2 + 2 MOH 2 H20 + 2 e- H2 + 2 OH- - 2006Kubinec, Pines, Nitsche, UCB L10-18 Lecture Complete 2006Kubinec, Pines, Nitsche, UCB L10-19 2006 Kubinec, Pines, Nitsche, UCB 6 ...
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