In a hydrogen like atom, energy required to excite the electron from its first excited state to second excited state is 7.55 eV. The energy required to remove the electron from its ground state is

Options

A. 72.6 eV
B. 67.9 eV
C. 58.6 eV
D. 54.4 eV

Explanation

`13.6Z^(2)((1)/(2^(2))-(1)/(3^(2)))=7.55rArrZ=2, :. E=13.6xxZ^(2)=54.4eV`.