If first excitation potential of a hydrogen-like atom is `V` electron volt, then the ionization energy of this atom will be:

Options

A. V electron volt
B. `(3V)/4` electron volt
C. `(4V)/3` electron volt
D. cannot be calculated by given information

Answer

C

Explanation

First excitation energy `=RhC(1/(1^(2))-1/(2^(2))) =RhC 3/4`
`:. 3/4 RhC =V e.v`
`:. RhC=(4V)/3 e.v.`