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Cations: smaller than parent atom; Anions: larger than parent atom
For isoelectronic species: radius decreases with increasing atomic number
Example: $$O^{2-} \gt F^{-} \gt Na^{+} \gt Mg^{2+}$$
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Cations: smaller than parent atom; Anions: larger than parent atom
For isoelectronic species: radius decreases with increasing atomic number
Example: $$O^{2-} \gt F^{-} \gt Na^{+} \gt Mg^{2+}$$
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