The ionization energy of Li²⁺ is 122.4 eV. What is the energy required to excite an electron from n = 3 to n = 6?
E₃ = -13.6 eV, E₆ = -3.4 eV. ΔE = 10.2 eV.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Electronic Configuration - Aufbau Pauli Hund and Stability