Q15. Ans: option 4. How? Q.55. For which of the elements of different groups, the change in nonpolar covalent radii is maximum ? (1) Groups 1 and 2 (2) Groups 14 and 15 (3) Groups 16 and 17 (4) Groups 17 and 18 Share with your friends Share 0 Gaurav Singh answered this -1 View Full Answer