Which of the following factors correctly explain the frequent anomalies observed in the electronic c — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Anomalies in electronic configurations (like $Cr$, $Cu$, $Pd$, $Ag$) occur primarily because the energy difference between $(n-1)d$ and $ns$ orbitals is minimal. This allows electrons to shift to achieve the extra stability associated with half-filled ($d^5$) or completely filled ($d^{10}$) configurations, which offer maximum exchange energy and spherical symmetry.