Calcium Ionization Energy

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

Calcium Ionization Energy

Ca -> Ca1+ = 589.7 kJ/mol = 141.08 Kcal/mol
Ca1+ -> Ca2+ = 1145 kJ/mol = 273.92 Kcal/mol
Ca2+ -> Ca3+ = 4910 kJ/mol = 1174.64 Kcal/mol
Ca3+ -> Ca4+ = 6474 kJ/mol = 1548.80 Kcal/mol
Ca4+ -> Ca5+ = 8144 kJ/mol = 1948.33 Kcal/mol
Ca5+ -> Ca6+ = 10496 kJ/mol = 2511.00 Kcal/mol
Ca6+ -> Ca7+ = 12320 kJ/mol = 2947.37 Kcal/mol
Ca7+ -> Ca8+ = 14207 kJ/mol = 3398.80 Kcal/mol
Ca8+ -> Ca9+ = 18191 kJ/mol = 4351.91 Kcal/mol
Ca9+ -> Ca10+ = 20385 kJ/mol = 4876.79 Kcal/mol