Using Bohr's formula for energy quantization, the ionisation potential of first excited state of hydrogen atom is

The ratio of energies of first two excited states hydrogen atom is

Using Bohr's formula for energy quantisation, determine the ionisation potential of the ground state of Li^(++) atom.

Using Bohr's formula for energy quantization, determine (i) the longest wavelength in Lymann series of hydrogen atom spectrum. (ii) the excitation energy of the n=3 level of He^(+) atom. (iii) the ionization potential of the ground state of Li^(++) atom.

Minimum excitation potential of Bohr's first orbit hydrogen atom is

Minimum excitation potential of Bohr's first orbit hydrogen atom is