CHEM 201 - 9.24.07

CHEM 201 - 9.24.07 - • P y – figure eight on the y axis...

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CHEM 201 – September 24, 2007 Aufbau Principle o Lower n orbitals fill first o Each orbital holds two e - ; each with different spin o Half-fill degenerate orbitals before pairing e - o Example: Boron: 1s 2 2s 2 2p 1 s↑↓ s↑↓ p↑_ __ __ Example: Carbon: 1s 2 2s 2 2p 2 s↑↓ s↑↓ p↑_ ↑_ __ Example: Nitrogen: 1s 2 2s 2 2p 3 s↑↓ s↑↓ p↑_ ↑_ ↑_ Example: Sodium: [Ne]3s 1 o Wave Function Principal Quantum number (n) – size Angular momentum QN (ℓ) – shape (s, p, d, f) Magnetic quantum number (m ) – orientation Spin quantum number (m s ) – spin up or down o Orbital shapes S-orbital Circle P-orbital P x – figure eight on the x axis o Positive region is in negative x region
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Unformatted text preview: • P y – figure eight on the y axis o Positive region is in the negative y region • P z – figure eight on the z axis o Positive region is in the negative z region D-orbital • D xy – four leaf clover aligned in the xy-plane with maximums at the 45º mark • D yz – four leaf clover aligned in the yz-plane with maximums at the 45º mark • D xz – four leaf clover aligned in the xz-plane with maximums at the 45º mark • D z^2 – figure eight around the z axis with a doughnut at the center • D (x^2 – y^2) – four leaf clover aligned on the x and y axes...
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This note was uploaded on 04/07/2008 for the course CHEM 201 taught by Professor Harris during the Fall '07 term at Bucknell.

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