Isoelectronic Series: Ionic Radii (Among isoelectronic species, higher nuclear charge pulls the same electron cloud tighter →)
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Among isoelectronic species, higher nuclear charge pulls the same electron cloud tighter → smaller radius
What each symbol means
| Symbol | What it stands for |
|---|---|
| Z | Nuclear charge (atomic number of the species’ nucleus) |
When to use this
Same number of electrons (e.g. Ne-type: Na⁺, Mg²⁺, Al³⁺, N³⁻, O²⁻, F⁻). Compare only within the isoelectronic set.