The following pictures represent alkali halide salts.
-Which salt has the highest lattice energy?
A)picture (a)
B)picture (b)
C)picture (c)
D)picture (d)

Question

The following pictures represent alkali halide salts. 
-Which salt has the highest lattice energy?
A)picture (a) 
B)picture (b) 
C)picture (c) 
D)picture (d)

Quizplus · Accepted Answer

The lattice energy of an alkali halide salt increases with the charge of the ions and decreases with the size of the ions. Among the given options, (d) has the highest charge on both the cation (Ca2+) and the anion (F-), and also the smallest size of both the ions compared to other options, making it have the highest lattice energy.

The Following Pictures Represent Alkali Halide Salts