For a doubly ionised Li-atom

As par Bohr model, the minimum energy (in eV ) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is

A doubly ionised Li atom is excited from its ground state(n = 1) to n = 3 state. The wavelengths of the spectral lines are given by lamda_(32), lamda_(31) and lamda_(21) . The ratio l_(32)//lamda_(31) and l_(21)//l_(31) are, respectively

The ratio between acceleration of the electron in singly ionised helium atom and doubly ionised lithium atom (both in ground state ) is

This is a doubly ionized Helium atom.