How much energy excites a ground-state hydrogen atom to its first excited state?
A12.09 eV
B13.6 eV
C3.40 eV
D10.2 eV
Answer & Solution
Correct answer: D. 10.2 eV
E2 - E1 = -3.40 eV - (-13.6 eV) = 10.2 eV.
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