lecture17 (11-8-2006) Ch 8

Lecture17 - Chemistry 2A-c F2006(Ch8-68)164 ENERGY LEVEL DIAGRAM FOR A MULTIELECTRON ATOM BROMINE ELECTRONIC CONFIGURATION 5s 4s 4d 4p 3d E 3s 2s

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1 1 s E 2 s 2 p 3 s 3 p 3 d 4 s 4 p 5 s 4 d ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ENERGY LEVEL DIAGRAM FOR A MULTI- ELECTRON ATOM BROMINE ELECTRONIC CONFIGURATION ↑↓ ↑↓↑↓↑↓↑↓↑↓ ↑↓↑↓ [Ar] 4 s 2 3 d 10 4 p 5 Chemistry 2A Chemistry 2A -c F2006 c F2006 (Ch8 (Ch8 -68)164 68)164
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2 Chemistry 2A Chemistry 2A -c F2006 c F2006 (Ch8 (Ch8 -69)165 69)165
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3 the metals that fill the d orbitals in their valence shell . TRANSITION METALS HUND’S RULE OBEYED FOR ALL EXCEPT Cr and Cu Cr: [Ar] 4 s 2 3 d 4 EXPECTED OBSERVED Cr: [Ar] 4 s 1 3 d 5 Cu: [Ar] 4 s 1 3 d 10 WHEN n=3 Cu: [Ar] 4 s 2 3 d 9 EXPECTED OBSERVED Chemistry 2A Chemistry 2A -c F2006 c F2006 (Ch8 (Ch8 -70)166 70)166 Stability for half-filles and filled d- orbitals
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4 FORMATION OF IONS FORMATION OF ANIONS Cl [Ne] 3 s 2 3 p 5 Cl + e - Cl - ΔΕ = −349 kJ/mol Cl - [Ne] 3 s 2 3 p 6 ISOELECTRONIC WITH Ar Ar [Ne] 3 s 2 3 p 6 SAME NUMBER OF ELECTRONS Chemistry 2A Chemistry 2A -c F2006 c F2006 (Ch8 (Ch8 -71)167 71)167 e - Electron Affinity EA = 349 kJ/mol=3.62 eV Exothermic or release energy (heat)
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This note was uploaded on 04/23/2008 for the course CHEM 2A taught by Professor Guo during the Fall '08 term at UC Davis.

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Lecture17 - Chemistry 2A-c F2006(Ch8-68)164 ENERGY LEVEL DIAGRAM FOR A MULTIELECTRON ATOM BROMINE ELECTRONIC CONFIGURATION 5s 4s 4d 4p 3d E 3s 2s

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