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  4. The higher lattice energy corresponds to

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Q. The higher lattice energy corresponds to

Chemical Bonding and Molecular Structure

Solution:

Lattice energy $\propto$ charge of ion $\propto \frac{1}{\text{size of ion}}$ On moving downward, the size of alkaline earth metals increases due to increase in number of shells. Thus, Mg has the smallest size. Hence, lattice energy is higher for $MgO$.