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Chapter 16 Winter 2011

Chapter 16 Winter 2011 - Quiz How did the reading go...

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Chapter 16 The Quantum Model of the Atom Did you read all of Chap. 16 for today? a) Yes b) No Quiz: How did the reading go? a) Understood everything wanted more b) OK, but have questions c) Not so well—but understood that they were talking about a new model of the atom d) And I thought “LOST” was just a TV show Earth Perspective fast Relativity large small slow Newton’s Laws ok Wave-Particle Duality Question? Standing waves are created when waves reflect and bounce back to where they started from. Think of a violin string. BUT, can they be created on a round surface? a) Yes b) No Go check out the Wave-a-Tron in ESC
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Standing Waves square4 Recall we created standing waves using a jigsaw and a stretching band. Tacoma Narrows Bridge. 2 Dimensions square4 It is easy to create standing waves in 2 dimensions as well. A single wave on a drum head Two waves on a drum head Three waves on a drum head 3 Dimensions square4 Standing waves can be set up inside the cavities of musical instruments as well. The patterns trace the nodes and antinodes on the violin back. Wrap standing waves around a point square4 These are patterns of vibration. One wave Two waves Three waves
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Bohr Model Explained! square4 Take deBroglie’s waves and wrap them in a standing wave pattern around the nucleus. square4 Put one wavelength , then two, then three, etc. and you exactly predict the location of the Bohr radii! A CRUDE representation! The Quantum Model of the Atom square4 Electrons are found in 3-D electron probability waves surrounding the nucleus.
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