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What exactly is the connection between increasing effective nuclear charge (Zeff) and ionization energy increasing across a period? I understand that Zeff increases as you move down, but I'm getting lost on how it's connected to the ionization energy.
Ionization energy is the minimum energy required to remove one mol of electrons from one mol of an atom. Therefore, the tighter the hold on the electrons, the higher the ionization energy is as it is more difficult to remove said valence electron. Species with higher effective nuclear charge have a tighter hold on the electrons and therefore a higher ionization energy.
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