L10S08 Electronicconfig-Ioniz-Spin

L10S08 Electronicconfig-Ioniz-Spin - CHEM 1A L10:

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Unformatted text preview: CHEM 1A L10: "ElectronicConfig__Ioniz_Spin Ionization Energies, Shielding Summary 3 2 1 2372 5248 328 H (kJ/mol) IE He+ He (1s12) 1) He (1s 2p 3 6 6 4 4 2 3 3 2 2 1 1 Many-e-system One-e Many- - system One- 1312 IE= IE= Z2 eff n2 R 2004 M.Kubinec 1 1 L10-9 2004 M.Kubinec, A. Pines L11-1 Energy Levels n 3 2 Ionized E 0 -R -R 4 9 =0 3s 2s =1 1 =2 -2 -1 0 1 2 m=-1 0 3p 3p 3p 2p 2p 2p 3d (5 orbitals) 1 Ground -R 1s Notation: nm L11-2 2004 M.Kubinec, A. Pines Multi-Electron Atoms, Ions =0 =1 =2 Shielding 4s 3s 2s 1s 2004 M.Kubinec, A. Pines 4p 3p 2p 3d - + 2p 2s E(3d) > E(4s) 3d) 4s) E(2p) > E(2s) 2p) 2s) 1s L11-3 2004 M. Kubinec, A.Pines 1 CHEM 1A L10: "ElectronicConfig__Ioniz_Spin Ionization Energies, Shielding 3 2 H (kJ/mol) 328 1312 IE He+ He (1s12) 1) He (1s 2p 6 3 6 4 4 2 3 3 2 2 Many-e-system One-e Many- - system One- 1 2372 5248 IE= IE= Z2 eff n2 R 1 1 2004 M.Kubinec, A. Pines 1 1 L11-4 ChemQuiz 10.1 Which atom or ion has the lowest ionization energy ? + 3 2 1 1) H (2p) 2004 M.Kubinec, A. Pines 2) He+ (3p) 3) Li2+ (4p) L11-5 ChemQuiz 10.2 Which atom has the lowest Ionization Energy? Energy? + 3 2 1 A) H (2p) 2004 M.Kubinec, A. Pines B) He (1s3p) C) Li (1s24p) L11-7 2004 M. Kubinec, A.Pines 2 CHEM 1A L10: "ElectronicConfig__Ioniz_Spin 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 2004 M.Kubinec, A. Pines n, , m , ms L11-9 No two electrons can have have the same set of Quantum Numbers Pauli Exclusion Principle n, , m , ms Degenerate Orbitals 2004 M.Kubinec, A. Pines Hund's Rule: Fermions vs. Bosons Parallel Spins Lowest Energy L11-10 Electronic Configurations Atom 1s 2s 2p 3s Config. Config. Magnetism H He Li Be B 2004 M.Kubinec, A. Pines 1s1 1s2 1s22s1 1s22s2 1s22s22p1 + 0 + 0 + L11-11 2004 M. Kubinec, A.Pines 3 CHEM 1A L10: "ElectronicConfig__Ioniz_Spin Atom 1s 2s Electronic Configurations 2p 3s Config. Magnetism Config. C N O F Ne Na 2004 M.Kubinec, A. Pines 1s22s22p2 ++ 1s22s22p3 +++ 1s22s22p4 1s22s22p5 1s22s22p6 [Ne]3s1 ++ + 0 + L11-12 ChemQuiz 10.3 When an electron spin flips, for which of the flips, following is the energy not altered ? A) N 2004 M. Kubinec, A.Pines 2s 1s 2p B) O C) F L11-13 ChemQuiz 10.4 Which species can have the electronic configuration [He]2s22p53s1 ? A) F - B) Na C) Na+ L11-15 + 2004 M. Kubinec, A.Pines 2004 M. Kubinec, A.Pines 4 CHEM 1A L10: "ElectronicConfig__Ioniz_Spin Lecture Complete 2004 M.Kubinec, A. Pines L11-17 2004 M. Kubinec, A.Pines 5 ...
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