The ionization potential for second `H`e electron is

The ionization potential for second He electron is

The ionization potential for the electron in the ground state of the hydrogen atom is 13.6 eV "atom"^(-1). What would be the ionization potential for the electron in the first excited state of Li^(+) ?

The ionization potential for carbon atom is

The ionization potential for Lithium ion is

The first ionization potential of Mg is

The first ionization potential in electron volts of nitrogen and oxygen atoms are respectively given by