In a hydrogen atom, if energy of an electron in ground state is \( -13.6 \mathrm{eV} \), then en...

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In a hydrogen atom, if energy of an electron in ground state is \( -13.6 \mathrm{eV} \), then energy in the \( 2^{\text {nd }} \) excited state is :-
(1) \( -1.51 \mathrm{eV} \)
(2) \( -3.4 \mathrm{eV} \)
(3) \( -6.04 \mathrm{eV} \)
(4) \( -13.6 \mathrm{eV} \)
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