Successive Ionization Energies: Core Jump (Huge jump in ionization energy when the next electron removed comes from a completed inner)

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Huge jump in ionization energy when the next electron removed comes from a completed inner shell

What each symbol means

SymbolWhat it stands for
I_kk-th ionization energy

When to use this

Gas-phase species. The ‘jump’ locates the valence electron count; used to infer group number.