Academy 49 the ionic radi of cs" and c ions are 181 and 167 pm, respectively. the born exponents for the ane he, ne, ar, krand xe configurations are 5, 7,9, 10

ACADEMY 49 The ionic radi of Cs" and C ions are 181 and 167 pm, respectively. The Born exponents for the ANe He, Ne, Ar, Krand Xe configurations are 5, 7,9, 10 and 12 respectively. If the value of 4TE 2.45 10 J m, the lattice energy (in kJ mol-) of CsCl according to Bom-Lande equation is