Question : Excitation energy of a hydrogen like ion in its excitation state is 40.8 eV. Energy needed to remove the electron from the ion in ground state is
A. 54.4 eV
B. 13.6 eV
C. 40.8 eV
D. 27.2 eV
Answer:A
Question : Excitation energy of a hydrogen like ion in its excitation state is 40.8 eV. Energy needed to remove the electron from the ion in ground state is
A. 54.4 eV B. 13.6 eV C. 40.8 eV D. 27.2 eV