[填空题]
Estimate the binding en + ,h1 bv/;qbow(oim7ijgu*gw ergy of a KCl molecule by calculating the electrostatic pg; g*71b bw+(oijmhui/w o,qv )3gcsctr j8i b4x x4w2otential energy when the tis xc )bw3x82rc44 jg$ \text{K}^+ $ and $ \text{Cl}^- $ ions are at their stable separation of 0.28 nm. Assume each has a charge of magnitude $ 1.0e $. Binding energy = eV
