Select the incorrect statement(s)/order(s) : — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

(a) Any orbital can accommodate max. 2 electrons. (b) For same Z, successive I.E. increases due to increase in (Z/e). (c) Co2+ [Ar] 3d7 4s0, unpaired e- = 3; Co3+ [Ar] 3d6 4s0, unpaired e- = 4. (d) I.E. of Pt (6 period) > I.E. of Pd (5 period) due to poor shielding effect of 4f subshell in 6 period elements.