Which of the following would have an electrostatic force of attraction between them?

A. Na + and Rb+

B. Cl - and O2-

C. Cs + and N3-

D. K + and Xe

Option C. Cs + and N3-

Cs + is a positive ion (has positive charge) and N3 - is a negative ion (has negative charge).

The electrostatic force arises among particles with charges.

When the charges are of the same sign the electrostatic, force is of repulsion; and when the charges are of different sign, the force is of attraction.