Ruthenium Ionization Energy

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

Ru -> Ru¹⁺ = 711 kJ/mol = 170.10 Kcal/mol
Ru¹⁺ -> Ru²⁺ = 1617 kJ/mol = 386.84 Kcal/mol
Ru²⁺ -> Ru³⁺ = 2747 kJ/mol = 657.18 Kcal/mol
Ru³⁺ -> Ru⁴⁺ = 4500 kJ/mol = 1076.56 Kcal/mol
Ru⁴⁺ -> Ru⁵⁺ = 6100 kJ/mol = 1459.33 Kcal/mol
Ru⁵⁺ -> Ru⁶⁺ = 7800 kJ/mol = 1866.03 Kcal/mol
Ru⁶⁺ -> Ru⁷⁺ = 9600 kJ/mol = 2296.65 Kcal/mol
Ru⁷⁺ -> Ru⁸⁺ = 11500 kJ/mol = 2751.20 Kcal/mol
Ru⁸⁺ -> Ru⁹⁺ = 18700 kJ/mol = 4473.68 Kcal/mol
Ru⁹⁺ -> Ru¹⁰⁺ = 20900 kJ/mol = 5000.00 Kcal/mol