For ions: hydration enthalpy β charge density
Alkaline earth metals: $$Be^{2+} \gt Mg^{2+} \gt Ca^{2+} \gt Sr^{2+} \gt Ba^{2+}$$
Higher charge density β stronger hydration
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CAT Formulas
Periodic Table & Periodicity
Hydration Enthalpy Trend
For ions: hydration enthalpy β charge density
Alkaline earth metals: $$Be^{2+} \gt Mg^{2+} \gt Ca^{2+} \gt Sr^{2+} \gt Ba^{2+}$$
Higher charge density β stronger hydration
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