Question

ratio of energy of electron of 1st orbit of hydrogen, 2nd orbit of ion and 3rd orbit of li2+ ion will be

Answer 1

The idea that electrons orbit or have a velocity has been abandoned in the first part of the previous century.

Electrons cannot be orbiting because an orbiting electron equals an accelerating charge and we know that an accelerating charge emits electromagnetic radiation at the cost of energy.

We do not see any electromagnetic radiation which proves that the electrons are not orbiting.

We do not know yet what the electrons are doing. That is where the quantum theories are about.