The NaF has smaller lattice energy.
The quantity of energy released by the electrostatic attraction of oppositely charged ions is known as lattice energy (L.E). The ion's size and charge affect the lattice energy.
lattice energy is inversely proportional to size of ion and directly proportional to charge of the ion We have magnesium oxide and sodium fluoride. Thus, our results are +2 and –2, +1 and –1, respectively. Usually, the size is wound by the charge out. These two are diminutive. These two are not particularly big, but they are bigger, and they charge twice as much. As a result, they will have higher lattice energy due to their doubled charge. Thus, the lattice energy is weaker. Yes, the Plus one and the -1 would produce the weaker lattice energy.
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