Chapter 7, Problem 80E

Which compound in each of the following pairs has the larger lattice energy? Note: ${\text{Mg}}^{2+}$ and ${\text{Li}}^{+}$ have similar radii; ${\text{O}}^{2-}$ and ${\text{F}}^{-}$ have similar radii. Explain your choices.

(a) $\text{MgO}\text{or MgSe}$

(b) $\text{LiF or MgO}$

(c) ${\text{Li}}_2\text{O or LiCl}$

(d) ${\text{Li}}_2\text{Se or MgO}$