Sodium Ionization Energy

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

Na -> Na¹⁺ = 495.8 kJ/mol = 118.61 Kcal/mol
Na¹⁺ -> Na²⁺ = 4562.4 kJ/mol = 1091.48 Kcal/mol
Na²⁺ -> Na³⁺ = 6912 kJ/mol = 1653.59 Kcal/mol
Na³⁺ -> Na⁴⁺ = 9543 kJ/mol = 2283.01 Kcal/mol
Na⁴⁺ -> Na⁵⁺ = 13353 kJ/mol = 3194.50 Kcal/mol
Na⁵⁺ -> Na⁶⁺ = 16610 kJ/mol = 3973.68 Kcal/mol
Na⁶⁺ -> Na⁷⁺ = 20114 kJ/mol = 4811.96 Kcal/mol
Na⁷⁺ -> Na⁸⁺ = 25490 kJ/mol = 6098.09 Kcal/mol
Na⁸⁺ -> Na⁹⁺ = 28933 kJ/mol = 6921.77 Kcal/mol
Na⁹⁺ -> Na¹⁰⁺ = 141360 kJ/mol = 33818.18 Kcal/mol