Lecturez14SHWeb - Wed Oct 12 2011 Todays Lecture Quantum...

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1 Wed. Oct. 12, 2011 Today’s Lecture Quantum Mechanics and Atomic Theory 12.4 The Bohr model 12.5 The quantum mechanical description 12.6 Particle in a box (review on your own) 12.7 The Wave Equation 12.8 Wave Functions Lecture 14
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2 Last Lecture
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3
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4 Color effects from fireworks are due to emission of light from ________________
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5 Light emitting molecules and plastics 1 cathode (CsF) anode (ITO) glass HTL (PEDOT:PSS) aluminum
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6 12.5 Quantum Mechanical Model of the Atom: Bohr’s model was fundamentally ________ – e - ’s ______ “orbit” (not in circular motion) the nucleus recall de Broglie: – e - ’s are particles that behaves as waves • e - bound to nucleus form standing waves • nodes: only certain wavelengths are allowed
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7 Unplucked string 1 half-wavelength 2 half-wavelengths 3 half-wavelengths Fig 12.11
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8 “Seeing Atoms with Scanning Probe Microscopy
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9
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10 – Heisenberg, de Broglie and Schrödinger: atoms can be described in terms of the wave properties of e - ’s using wave mechanics: _________________ • only certain orbits have a circumference into which a whole number of wavelengths will fit: Fig 12.12
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