Francium Ionization Energy

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

Fr -> Fr¹⁺ = 400 kJ/mol = 95.69 Kcal/mol
Fr¹⁺ -> Fr²⁺ = 2100 kJ/mol = 502.39 Kcal/mol
Fr²⁺ -> Fr³⁺ = 3100 kJ/mol = 741.63 Kcal/mol
Fr³⁺ -> Fr⁴⁺ = 4100 kJ/mol = 980.86 Kcal/mol
Fr⁴⁺ -> Fr⁵⁺ = 5700 kJ/mol = 1363.64 Kcal/mol
Fr⁵⁺ -> Fr⁶⁺ = 6900 kJ/mol = 1650.72 Kcal/mol
Fr⁶⁺ -> Fr⁷⁺ = 8100 kJ/mol = 1937.80 Kcal/mol
Fr⁷⁺ -> Fr⁸⁺ = 12300 kJ/mol = 2942.58 Kcal/mol
Fr⁸⁺ -> Fr⁹⁺ = 12800 kJ/mol = 3062.20 Kcal/mol
Fr⁹⁺ -> Fr¹⁰⁺ = 29300 kJ/mol = 7009.57 Kcal/mol