Energy required for the electron excitation in Li++

Energy required for the electron excitation in Li++ from the first to the third Bohr orbit is

  1. 12.1 eV
  2. 12.4 eV
  3. 36.3 eV
  4. 108.8 eV

Answer

E1 = -[(13.6 x 32)/12]

E3 = -[(13.6 x 32)/32]

ΔE = E3 - E1 

= 13.6 x 32 x [1 - (1/9)]

= 108.8 eV

The correct option is D.