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# the ionization potential of H like species is 54.4ev the energy required to remove an electron from the n=2 state in this ion is

Eshan
3 years ago
Dear student,

Energy of electron in nth shell of a H like species of atomic number Z is

$\dpi{80} E\propto \dfrac{Z^2}{n^2}$
Therefore$\dpi{80} E_n=-54.4eV\dfrac{1^2}{2^2}=-13.6eV$
So the required energy to remove the particular electron is 13.6eV.