Chemistry 6 Friday, September 8, 2006

Chemistry 6 Friday, September 8, 2006 - Friday, September...

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Friday, September 08, 2006 Chemistry CALLING ALL ELECTRONS Where (in what orbitals are they e-? How is the periodic table related to orbitals? How do orbitals compare in E? Text: Sections 2.7-3.1 HIGHTEST OCCUPIED ORBITAL 1. Where is the highest E e-? 2. Method 1 = fill in orbital E diagram Example: What is the highest occupied orbital in an Al atom? 3d a ”p 1 configuration” A 3p1 configuration 3p sublevel #of e- 3s 2p Al has one unpaired e- 2s 1s 3. note # of unpaired e- (important in magnetism) Example: What is the highest occupied orbital in an Si atom? 3d 3p 3s 2p highest occupied orbital: 3p p 2 or 3p 2 configuration 2s 2 unpaired e- 1s 4. Hund’s rule: e- spread out with same spin in equal E orbitals (inside a sublevel)
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Friday, September 08, 2006 5. Method 2: periodic table in “blocks” ex. P, S, Cl, Ar continue to fill in 3p sublevel Ex. B-Ne fill in 2p sublevel top row at S block = 1s d block = 3d p block = 2p f block = 4f Ex. Highest occupied orbital and # of unpaired e- in: K atom = 4s (4s 1 ) and one 6.
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This note was uploaded on 03/20/2008 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

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Chemistry 6 Friday, September 8, 2006 - Friday, September...

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