Answer Happy

Q: A quantitative theory of bonding in ionic crystals was developed by born and Meyer. the total potential energy of the system is taken to be de ? U = N А R" 418 R Where N is the number of positive negative ion pairs and a is the Madelung constant. A and n are constants determined from experiments. a) Show that the equilibrium inter atomic distance is given by the expression R-1 4πε, Α n ae? b) Establish that the bonding energy at equilibrium is 1 U. Nae? 4πε R. 1 n c) calculate the constant n for Nacl, given that the measured binding energy for this crystal is 7.95eV /molecule and a = 1.75