Chap 7-8- Key - EXAM IV CHAPTERS 7 & 8 GENERAL...

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EXAM IV – CHAPTERS 7 & 8 GENERAL CHEMISTRY PAGE 1 OF 5 BE SURE TO SHOW ALL YOUR WORK CLEARLY! Planck’s constant = 6.626 x 10 -34 J.s Speed of Light = 3.00 x 10 8 m/s Mass electron = 9.11 x 10 -31 kg R H = -2.178 x 10 -18 J 1. Bohr developed an equation for hydrogen to calculate the change in energy when an electron experiences a quantum fall. (a) What is the equation to calculate a quantum fall? (b) What is the significance of the negative sign in the equation? (c) Calculate the frequency of light by a H + ion following a quantum fall n= 5 to n=3 (d) Briefly describe what happens when an electron experiences a quantum fall NAME: DATE:
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GENERAL CHEMISTRY PAGE 2 OF 5 2. Is light mostly waves or particle in nature? Briefly describe how Einstein and de Broglie contributed the theory of light. What equation did each derive to show their experimental results? What is the wavelength of an electron with a velocity 4.0% of the speed of light? 3.
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This note was uploaded on 01/21/2011 for the course PHYS 4A 60865 taught by Professor L. oldewurtel during the Fall '09 term at Irvine Valley College.

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Chap 7-8- Key - EXAM IV CHAPTERS 7 & 8 GENERAL...

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