Write the group member with atomic number for each of the following elements:
(i) F (at. no. 9) (ii) K (at. no. 19)
(iii) P (at. no. 15) (iv) Al (at. no. 13).
Element Group member (at. no.)
(i) F (2, 7) Cl (2, 8, 7 = 17)
(ii) K (2, 8, 8, 1) Na (2, 8, 1 = 11)
(iii) P (2, 8, 5) N (2, 5 = 7)
(iv) Al (2, 8, 3) B (2, 3 = 5).
