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Semiconductors

why small val...

Question

why small value of ionisation energy and large value of electron affinity decrease the lattice energy of ionic compounds?

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Solution

The low value of ionisation energy means the metal atom can be easily converted to M⁺and high value of Electron affinity means the nonmetal is easily converted to X^-.

As the formation of M⁺ and A^-is an important step, the lattice energy (energy release during the formation of 1 mole of an ionic compound) it depends on the above two factors.

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