An element has the general outer electronic configuration , where the highest principal quantum numb — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Substituting $n=4$ yields the configuration $3d^5 4s^1$, which is the half-filled anomalous configuration of Chromium ($Cr$). For d-block elements, the group number is calculated as the sum of $(n-1)d$ electrons and $ns$ electrons. Group number = $5 + 1 = 6$.