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fodog414 fodog414
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9 years ago
When an electron in a 2p orbital of a particular atom makes a transition to the 2s orbital, a photon of approximate wavelength 638.8 nm is emitted. The energy difference between these 2p and 2s orbitals is
 
A) 3.11 × 10–28 J
B) 3.11 × 10–19 J
C) 3.11 × 10–17 J
D) 1.27 × 10–31 J
E) none of these

Can anyone show me the formula we use to calculate the problem?
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KekaiKekai
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9 years ago
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fodog414 Author
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#2
9 years ago
Thank you!
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#3
9 years ago Edited: 9 years ago, Kekai
No problem!  Just make sure to pay special attention to the UNITS in future problems.  
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