The magnitude of the attractive force between two ions, a2+ and b2- at equilibrium is 5.6e-9 n. determine (a) the interionic distance, (b) the ionic radius of b2- if that for a2+ is 0.239239 nanometers, (c) the magnitude of the repulsive force between the two ions at this position, (d) the value of the coulomb's constant b and (e) the minimum potential energy of the bond. assume n = 7 in coulomb's law. don't forget ! (a) interionic distance: (b) ionic radius of b: (c) magnitude of force (d) coulomb's b: (e) emin