Which of the following is the incorrect match for atom of element ? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

(a) [Ar]3d5 4s1 -> Cr(24) -> 4th period, 6th group (b) [Kr]4d10 -> Pd(46) -> 5th period, 12th group (c) [Rn]6d2 7s2 -> Th(90) -> 7th period, 3rd group (d) [Xe]4f14 5d2 6s2 -> Hf(72) -> 6th period, 4th group