An excited hydrogen atom emits light with a frequency of 1.141 multiplied by 1014 Hz to reach the energy level for which n = 4. In what principal quantum level did the electron begin?
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You have (can figure out the frequency), R (the Rydberg constant), and the final energy level of the electron.
Just a matter of algebra from here to solve for .
Last edited by o_O; September 7th 2008 at 07:02 PM.
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