The Terbium Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Terbium.
Tb -> Tb+ + e-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Terbium is:
TbN+ -> Tb(N+1)+ + e-
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Tb -> Tb1+ = 564.6 kJ/mol = 135.07 Kcal/mol
Tb1+ -> Tb2+ = 1112 kJ/mol = 266.03 Kcal/mol
Tb2+ -> Tb3+ = 2114 kJ/mol = 505.74 Kcal/mol
Tb3+ -> Tb4+ = 3839 kJ/mol = 918.42 Kcal/mol
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