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Unformatted text preview: Chemistry 455 A Autumn 1998 Reinhardt, Gibbons and Caralombous No Calculators of any type may be used on this exam! Each student may have one (1) handwritten 5 by 8 inch note card. Note that all answers must be supported by work clearly shown, or a an explicit explanation in words of how the result was arrived at! Exam #1.v.1 (100 points) Name: _________________________________________ UW ID#:_______________________________________ Signature: ______________________________________ Points Problem #1______________________ Problem #2______________________ Problem #3______________________ Total _____________________ Problem #1. 20 points. The Bohr atom. This problem is from your homework. The energy of an electron in the n th Bohr orbit for a nucleus of atomic number Z is E = - Z 2 m e 4 /(8 o 2 h 2 n 2 ) We are approximating by m = electron mass. (15 points) Using the formula above, derive the general Rydberg- Balmer formula: 1 / = Z 2 R ( 1/n 2- 1/m 2 ) and arrive at an explicit expression for the Rydberg constant R, in terms of the fundamental constants,...
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This note was uploaded on 05/17/2008 for the course CHEM 455 taught by Professor Reinhardt during the Spring '06 term at University of Washington.
- Spring '06