Einsteinium Ionization Energy

The Einsteinium Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Einsteinium.
Es -> Es⁺ + e^-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Einsteinium is:
Es^N+ -> Es^(N+1)+ + e^-

Es -> Es¹⁺ = 619 kJ/mol = 148.09 Kcal/mol