Manfra13-2011

Manfra13-2011 - CHAPTER 4 Structure of the Atom 4.1 4.2 4.3...

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4.1 The Atomic Models of Thomson and Rutherford 4.2 Rutherford Scattering 4.3 The Classic Atomic Model 4.4 The Bohr Model of the Hydrogen Atom 4.5 Successes & Failures of the Bohr Model 4.6 Characteristic X-Ray Spectra and Atomic Number CHAPTER 4 Structure of the Atom The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth. An expert is a person who has made all the mistakes that can be made in a very narrow field. Never express yourself more clearly than you are able to think. Prediction is very difficult, especially about the future. - Niels Bohr Niels Bohr (1885-1962)
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Electrons can’t back- scatter α particles. Calculate the maximum scattering angle— corresponding to the maximum momentum change. It can be shown that the maximum momentum transfer to the α particle is: Determine θ max by letting pmax be perpendicular to the direction of motion: Befor e After 2 v max e p m = 2 v v e max p m p M = = = too small!
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Manfra13-2011 - CHAPTER 4 Structure of the Atom 4.1 4.2 4.3...

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