Question

Sulphur is placed in group 16 [VIA], chlorine in group 17[VIIA] but argon in group 18 [0 group] of the periodic table .Give reasons.

Answer 1

Sulphur is placed in group 16 [VIA], chlorine in group 17[VIIA] but argon in group 18 [0 group] of the pericdic table.

Electronic configurations of S, Cl and Ar are:

With 6 electrons in the outermost or valence shell, S is placed in Group 16. In the same way Cl with 7 electrons in the valence shell is placed in Group 17 and Ar with 8 electrons in the valence shell is placed in Group 18.