What is the energy of a hydrogen electron in the n = 2 level?
A-6.80 eV
B-13.6 eV
C-1.51 eV
D-3.40 eV
Answer & Solution
Correct answer: D. -3.40 eV
En = -13.6/n^2 eV, so for n = 2 the energy is -13.6/4 = -3.40 eV.
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