Why does lattice energy decreases with increase in anionic and cationic size?

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Solution

Because as the size increases the coulombic forces of attraction decreases as the positive and negative ions get far apart.

and since the lattice energy also depends on the coulombic forces of attraction between the ions, hence it decreases.

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Why does lattice energy decreases with increase in anionic and cationic size?

Because as the size increases the coulombic forces of attraction decreases as the positive and negative ions get far apart. and since the lattice energy also depends on the coulombic forces of attraction between the ions, hence it decreases.

Because as the size increases the coulombic forces of attraction decreases as the positive and negative ions get far apart.

and since the lattice energy also depends on the coulombic forces of attraction between the ions, hence it decreases.