The ratio of the kinetic energies of an electron in the first orbit of Li²⁺ to the second orbit of H is: (v₁ for H = 2.1
KE₁(Li²⁺)/KE₂(H) = 9.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Quantum Numbers - Principal Azimuthal Magnetic Spin
