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Property of the alkaline earth metals that increases with their atomic number

1. Solubility of their hydroxides in water
2. Solubility of their sulphates in water
3. Ionization energy
4. Electronegativity

Correct answer: Solubility of their hydroxides in water

Solution

As we move down the group in alkaline earth metals, the solubility of their hydroxides in water increases due to a decrease in lattice energy, which outweighs the decrease in hydration energy.

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