Calculate the force of attraction between a Na⁺ and a Cl⁻ ion, the centers of which are separated by a distance of 282 pm.
a) 2.14 × 10⁻⁸ N
b) 4.28 × 10⁻⁸ N
c) 6.42 × 10⁻⁸ N
d) 8.56 × 10⁻⁸ N