3.3: Trends in Ionization Energy - Chemistry LibreTexts
https://chem.libretexts.org/Courses/Oregon_Institute_of_Technology/OIT%3A_CHE_202_-_General_Chemistry_II/Unit_3%3A_Periodic_Patterns/3.3%3A_Trends_in_Ionization_Energy
WEBThus, successive ionization energies for one element always increase. As seen in Table 3.3.1 3.3. 1, there is a large increase in the ionization energies (color change) for each element. This jump corresponds to removal of the core electrons, which are harder to remove than the valence electrons.
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