Energy Levels: The longest wavelength photon that can be emitted by a hydrogen atom, for which the final state is n = 9, is closest to which one of the following values? (c = 3.0 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 39,000 nm
B. 22,000 nm
C. 7400 nm
D. 16,000 nm
E. 28,000 nm
Answer: A
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