The Ytterbium Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Ytterbium.
Yb -> Yb+ + e-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Ytterbium is:
YbN+ -> Yb(N+1)+ + e-
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Yb -> Yb1+ = 603.4 kJ/mol = 144.35 Kcal/mol
Yb1+ -> Yb2+ = 1176 kJ/mol = 281.34 Kcal/mol
Yb2+ -> Yb3+ = 2415 kJ/mol = 577.75 Kcal/mol
Yb3+ -> Yb4+ = 4220 kJ/mol = 1009.57 Kcal/mol
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