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posted by Frank on Monday, May 7, 2012 at 8:40pm.
when an electron in a hydrogen atom transitions from the n = 5 level to the n = 2 level, what wavelength photon (in nm) is emitted? Thanks!
1/wavelength = R*(1/2^2 - 1/5^2) R = Rydberg constant = 1.097E7
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