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answerhappygod
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need help asap

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need help asap
Need Help Asap 1
Need Help Asap 1 (12.4 KiB) Viewed 22 times
An electron relaxes from n-4 (-1.60 x 10-18 J) to n=2 (-2.20 x 10-18 J). What is the wavelength of the photon that is emitted (in nm)? (Round to three significant figures.)
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