The successive ionization energies of a certain element are:… Questions The successive iоnizаtiоn energies оf а certаin element are:I₁ = 589.5 kJ/mol, I₂ = 1145 kJ/mol, I₃ = 4900 kJ/mol, I₄ = 6500 kJ/mol, I₅ = 8100 kJ/mol.This pattern suggests the element is: Show Answer Hide Answer