[填空题]
Estimate the binding enerklq;k8y99pl zrs)87l ,bm yvngy of a KCl k)98zzzqn.1, vuavl gmolecule by calculating the electrostatic p8z .1gzuv)z9va , lnkqotential energy when the $ \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
