The Selenium Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Selenium.
Se -> Se+ + e-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Selenium is:
SeN+ -> Se(N+1)+ + e-
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Se -> Se1+ = 940.9 kJ/mol = 225.10 Kcal/mol
\nSe1+ -> Se2+ = 2044 kJ/mol = 489.00 Kcal/mol
\nSe2+ -> Se3+ = 2974 kJ/mol = 711.48 Kcal/mol
\nSe3+ -> Se4+ = 4144 kJ/mol = 991.39 Kcal/mol
\nSe4+ -> Se5+ = 6590 kJ/mol = 1576.56 Kcal/mol
\nSe5+ -> Se6+ = 7883 kJ/mol = 1885.89 Kcal/mol
\nSe6+ -> Se7+ = 14990 kJ/mol = 3586.12 Kcal/mol
\nSe7+ -> Se8+ = 19500 kJ/mol = 4665.07 Kcal/mol
\nSe8+ -> Se9+ = 23300 kJ/mol = 5574.16 Kcal/mol
\nSe9+ -> Se10+ = 27200 kJ/mol = 6507.18 Kcal/mol
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