Radium Ionization Energy

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

Ra -> Ra¹⁺ = 509.3 kJ/mol = 121.84 Kcal/mol
Ra¹⁺ -> Ra²⁺ = 979 kJ/mol = 234.21 Kcal/mol
Ra²⁺ -> Ra³⁺ = 3300 kJ/mol = 789.47 Kcal/mol
Ra³⁺ -> Ra⁴⁺ = 4400 kJ/mol = 1052.63 Kcal/mol
Ra⁴⁺ -> Ra⁵⁺ = 5700 kJ/mol = 1363.64 Kcal/mol
Ra⁵⁺ -> Ra⁶⁺ = 7300 kJ/mol = 1746.41 Kcal/mol
Ra⁶⁺ -> Ra⁷⁺ = 8600 kJ/mol = 2057.42 Kcal/mol
Ra⁷⁺ -> Ra⁸⁺ = 9900 kJ/mol = 2368.42 Kcal/mol
Ra⁸⁺ -> Ra⁹⁺ = 13500 kJ/mol = 3229.67 Kcal/mol
Ra⁹⁺ -> Ra¹⁰⁺ = 15100 kJ/mol = 3612.44 Kcal/mol