According to Coulomb's Law, Which Ionic Compound A-D Has the Smallest

Multiple Choice

According to Coulomb's law, which ionic compound A-D has the smallest electrostatic potential energy (i.e., closest to zero) ? The size of the anion increases in the order F < Cl < Br < I.

A) NaF
B) NaCl
C) NaBr
D) NaI
E) All have the same potential energy because the anions all have -1 charges.