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

Multiple Choice

According to Coulomb's law, which ionic compound A-D has the largest electrostatic potential energy (i.e., largest in magnitude) ?

A) NaCl
B) CaCl₂
C) AlCl₃
D) CoCl₂
E) All have the same potential energy because the chloride anions all have -1 charges.