Thallium Ionization Energy

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

Tl -> Tl¹⁺ = 589.3 kJ/mol = 140.98 Kcal/mol
Tl¹⁺ -> Tl²⁺ = 1971 kJ/mol = 471.53 Kcal/mol
Tl²⁺ -> Tl³⁺ = 2878 kJ/mol = 688.52 Kcal/mol
Tl³⁺ -> Tl⁴⁺ = 4900 kJ/mol = 1172.25 Kcal/mol
Tl⁴⁺ -> Tl⁵⁺ = 6100 kJ/mol = 1459.33 Kcal/mol
Tl⁵⁺ -> Tl⁶⁺ = 8300 kJ/mol = 1985.65 Kcal/mol
Tl⁶⁺ -> Tl⁷⁺ = 9500 kJ/mol = 2272.73 Kcal/mol
Tl⁷⁺ -> Tl⁸⁺ = 11300 kJ/mol = 2703.35 Kcal/mol
Tl⁸⁺ -> Tl⁹⁺ = 14000 kJ/mol = 3349.28 Kcal/mol
Tl⁹⁺ -> Tl¹⁰⁺ = 16000 kJ/mol = 3827.75 Kcal/mol