Why Are lonic Compounds So Stable? q Coulombic Attraction Between Point Charges: E=(9+q)e2 4元e。d Repulsion Between Electron Clouds Goes Like B dn So Total Energy(E)vs.Distance(d)is: E- (9+)(q-)e2 B 4元o d dn XIII-14Why Are Ionic Compounds So Stable? Repulsion Between Electron Clouds Goes Like Coulombic Attraction Between Point Charges: d So Total Energy(E) vs. Distance(d) is: E = (q+ )(q− )e2 4 π εo d B dn E = (q+ )(q− )e2 4 π εo d + B dn q+ q￾XIII-14