Excitation energy of a hydrogen like ion, in its first excitation state, is 40.8 eV. The energy needed to remove the electron from the ion in ground state is
Options
(a) 13.6 eV
(b) 27.2 eV
(c) 40.8 eV
(d) 54.4 eV
Correct Answer:
54.4 eV
Explanation:
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