A gas-phase hydrogen atom absorbs a photon of visible light and then emits a photon of ultraviolet l — Atomic Structure Chemistry Question
Question
A gas-phase hydrogen atom absorbs a photon of visible light and then emits a photon of ultraviolet light. What may be concluded about its initial and its final values of the principal quantum number n?
A.
Initially n = 1 and finally n = 2
B.✓ Correct
Initially n = 2 and finally n = 1
C.
Initially n = 2 and finally n = 4
D.
This scenario is impossible because ultraviolet light is more energetic than visible light.
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