[填空题]
The measured binding energy of KCl is 4 3bv8cog8lru4.43 eV. From the result of Problem 1, es+5oni;,j :fxkg(d oyctimate the contribution to the binding energy of the repelling elec:5(dkfx+gy n;, j icootron clouds at the equilibrium distance $ r_0 = 0.28\ \text{nm} $. $PE_{\text{clouds}} =$ $\ \text{eV}$
