Question 185 of 193

Which of the following statements is/are wrong?

(a) van der Waals' radius of iodine is more than its covalent radius

(b) All isoelectronic ions belong to same period of the periodic table

(c) I.E.1 of N is higher than that of O while I.E.2 of O is higher than that of N

(d) The electron affinity N is almost zero while that of P is 74.3 kJ mol-1