Chromium Ionization Energy

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

Cr -> Cr¹⁺ = 652.7 kJ/mol = 156.15 Kcal/mol
Cr¹⁺ -> Cr²⁺ = 1592 kJ/mol = 380.86 Kcal/mol
Cr²⁺ -> Cr³⁺ = 2987 kJ/mol = 714.59 Kcal/mol
Cr³⁺ -> Cr⁴⁺ = 4740 kJ/mol = 1133.97 Kcal/mol
Cr⁴⁺ -> Cr⁵⁺ = 6690 kJ/mol = 1600.48 Kcal/mol
Cr⁵⁺ -> Cr⁶⁺ = 8738 kJ/mol = 2090.43 Kcal/mol
Cr⁶⁺ -> Cr⁷⁺ = 15550 kJ/mol = 3720.10 Kcal/mol
Cr⁷⁺ -> Cr⁸⁺ = 17830 kJ/mol = 4265.55 Kcal/mol
Cr⁸⁺ -> Cr⁹⁺ = 20220 kJ/mol = 4837.32 Kcal/mol
Cr⁹⁺ -> Cr¹⁰⁺ = 23580 kJ/mol = 5641.15 Kcal/mol