what is ground state energy of hydrogen atom?

The ground state energy of hydrogen atom is 13.6 eV . Hence the energy of the ground level in doubly ionizeds lithium is what?

The ground state energy of hydrogen atom is -13.6 eV. What are the kinetic and potential energies in this state?

The groud state energy of hydrogen atom is -13.6 eV. The energy needed to ionise hydrogen atom form its second excited state in eV is