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october 9 - Chemistry 177 October 9 2009 Take out CLICKERS...

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1 Chemistry 177 October 9, 2009 Take out CLICKERS : “GO 41 GO” -or- “CH 41 CH” and CALCULATORS NEXT LECTURE: Monday, Oct. 12; Bring CLICKERS READ BLBM, Chapter 6.5-6.7 HOMEWORK #8: Ch. 6: # 34, 48, 54, 68, 71, 76 (Due in Recitation Thursday, October 15)
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2 Bohr Model of the Hydrogen Atom n = 1 n = 2 n = 3 +e r 1 v 1 e - ORBITS (1) Attractive Force bet. Proton and Electron = Centripetal Force causing Electron to move away from the Proton. 2 2 2 e mv r r = (a) Nucleus is “stationary” (heavy) (b) Charge of electron = - e = - 1.609 × 10 - 19 coulombs (c) Mass of electron = m = 9.11 × 10 - 31 kg (2) Angular Momentum is quantized into multiples of h /2 π . ; 1,2,3, 2 nh mvr n π = = K (3) Energy of the electron = Kinetic Energy + Potential Energy. 2 2 1 2 e E mv r = - H Atom pter 6: Electronic Structure of Atoms
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3 Bohr Model of the Hydrogen Atom n = 1 n = 3 +e r 1 v 1 e - ORBITS H Atom n = 2 pter 6: Electronic Structure of Atoms (a) Nucleus is “stationary” (heavy) (b) Charge of electron = - e = - 1.609 × 10 - 19 coulombs (c) Mass of electron = m = 9.11 × 10 - 31 kg
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4 -14 -12 -10 -8 -6 -4 -2 0 n = 1 n = 2 n = 3 n = 4 n = 5 n = 6 E n (eV) Bohr Model of the Hydrogen Atom pter 6: Electronic Structure of Atoms
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5 0 192 263 pter 6: Electronic Structure of Atoms Possible Clicker Question
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