Chemistry 5 Monday, September 6, 2006

# Chemistry 5 Monday, September 6, 2006 - 4p 3 6 2-2-1 0 1 2...

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Wednesday, September 06, 2006 Chemistry SECOND PART OF COURSE DESCRIBE MORE FULLY o QUANTUM THEORY o ATOMIC PROPERTIES QUANTUM LEAP How do we explain the wave/par hole duality of electrons? How are e- distributed in space? TEXT : Sections 2.4-2.6 QUANTUM THEORY 1. Standing waves a. As frequency increases, wavelength decreases b. Quantized c. Math functions describe wave d. Where the black crosses blue you get a node e. As frequency increases (energy increases), # nodes increases f. Waves define 3-d region in space 2. deBroglie a. model e- as standing wave b. note: 3- do diffract (wave prop) 3. Schrödinger a. Developed “wave functions” b. Relate E with wave functions c. Define a 3-d region in space “orbital” QUANUTUM NUMBRS n: principle q. n. = size l: angular momentum q. n. = shape m l : magnetic q. n. = direction n, l, m l defines a region in space (an orbital) m s : spin q. n. = + ½ or – ½ 2 e- in each orbital

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Wednesday, September 06, 2006 n l m symbol # orbital # e- sum of #e- 1 0 0 1s 1 2 2 2 0 0 2s 1 2 1 -1, 0, +1 2p 3 6 8 3 0 0 3s 1 2 1 -1, 0, +1 3p 3 6 18 2 -2, -1, 0, +1, +2 3d 5 10 4 0 0 4s 1 2 1 -1, 0, +1
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Unformatted text preview: 4p 3 6 2-2, -1, 0, +1, +2 4d 5 10 32 3-3, -2, -1, 0, +1, +2, +3 4f 7 14 After f the alphabet starts from ghijk… ORBITALS z 1. Drawn to show shape no outer surface 2. S-orbital spherical y a. 1 s function has greater intensity closer to nucleus x z x y 1s 2s size increases as n increases 3s Pz Py Px 3. p-orbital along x, y, z a. contain one planer node b. shading indicates the signing of a web function shading = sign of wave function 4. d-orbital more complex 5. new model of atom 6. Philosophical problem a. diff reality on atomic scale b. e- has been “stretch “ c. pictures come from waves not particles Wednesday, September 06, 2006 Bohr n = 3 -----Quantum (t e-) n = 3 ----- 3s 3p 3d n = 2 -----n = 2 ----- 2s 2p n = 1 -----n = 1 ----- 1s GOALS • List sum and differences between Bohr and quantum models • Determine the # of orbital and e- in each in level and n/1 sublevel • Stretch s and p orbital...
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Chemistry 5 Monday, September 6, 2006 - 4p 3 6 2-2-1 0 1 2...

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