( Na
◇ Interionic Forces nb attractive 4兀na repulsive n+1 nb →F 45a2 n+1 Z1, Z2=number of electrons removed or added from the atoms during the ion formation e=electron charge a =interionic separation distance Co- permittivity of free space=8.85X10-2C2/(N m2)
2 0 2 1 2 attractive 4 a Z Z e F = − repulsive +1 = − n a nb F 2 1 0 2 1 2 net 4 + = − − n a nb a Z Z e F Interionic Forces Z1 , Z2 ＝number of electrons removed or added from the atoms during the ion formation e ＝electron charge a ＝interionic separation distance ε0 ＝permittivity of free space＝8.85×10-12C2 /(N·m2 )
o Interionic Energies b E net 4丌Eaa Attractive Repul energy energy
Interionic Energies n a b a Z Z e E = + + 0 2 1 2 net 4 Attractive energy Repulsive energy