alleryThe energy required to excite a hydrogen atom from the ground state to its first excited state (n = 1 to n = 2) is approximately:
A13.6 eV
B12.1 eV
C10.2 eV
D3.4 eV
Answer & Solution
Correct answer: C. 10.2 eV
We have E_2 − E_1 = −3.4 − (−13.6).
So E_2 − E_1 = 10.2 eV.
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