MS115a Lect 20 11-09-2011

MS115a Lect 20 11-09-2011 - Review: The H 2 Molecule E...

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Unformatted text preview: Review: The H 2 Molecule E R-13.6 eV 2 anti-bonding states 2 bonding states 2 protons two 1 s states each 4 states total alternative representations H H Result: H 2 covalent bond Directional; typical of molecules R b a ~ A- = a b b a ~ S + = a b 1 s 1 s The N-atom Hydrogen Solid Chemical Bonding Continuous Bands 1 s 1 N-atom solid N electrons E R N anti-bonding states N bonding states R 1 s 2N states H 2 molecule: N = 2 overlap of states discrete continuous N states occupied N states unoccupied Silicon A real N-atom Solid Si: #14 1 s 2 2 s 2 2 p 6 3 s 2 3 p 2 E R 4N anti-bonding states 4N bonding states R R R E = sp 3 8N states overlap of states discrete continuous 4N states occupied 4N states unoccupied N-atom solid 4N relevant electrons [Ne] N-atom Solid Continuous Bands [3( sp 3 ) 4 ] hybrid orbital composed of 3s and all 3p orbitals: 3s: 2N states 3p: 6N states 8N states 3 p 3 p 3 s 3 s Hybridization: consider just 2 atoms bonding anti-bonding 6 states 2 states 4 states (+ 4) 4 states (+ 4) 3 1 3 1 E g Lithium: A Simple Metal...
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MS115a Lect 20 11-09-2011 - Review: The H 2 Molecule E...

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