8. Take the potential energy of a hydrogen atom to be zero for infinite separation of the electron and proton. Then the ground state energy of a hydrogen atom is −13.6 eV. The energy of the first excited state is:
(A) 0 eV
(B) −3.4 eV
(C) −6.8 eV
(D) −27.2 eV
(E) −54.4 eV

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