Four hypothetical 1 : 1 ionic compounds are described below.
Compound W: charges ±1, sum of ionic radii = 300 pm
Compound X: charges ±2, sum of ionic radii = 300 pm
Compound Y: charges ±1, sum of ionic radii = 120 pm
Compound Z: charges ±2, sum of ionic radii = 150 pm
Based on these data, which compound should have the SMALLEST magnitude of lattice energy?
a) X
b) W
c) Y
d) Z