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

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

Options

(a) solubility of their hydroxides in water
(b) solubility of their sulphates in water
(c) ionization energy
(d) electronegativity

Correct Answer:

solubility of their hydroxides in water

Explanation:

The solubility of an ionic compound depends on two factors: (a) lattice energy , and (b) hydration energy.
In case of alkaline metal hydroxides, the lattice energy decreases as we move down the group. This decrease is more than the decrease in the hydration energy down the group.

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