JEE Main Chemistry question

Chemistry Structure of Atom JEE Main

Chromium has a different electronic configuration than expected according to the aufbau principle because:

(A)Cr is a metal
(B)It belongs to the -block elements
(C)Half-filled -orbitals give extra stabilityCorrect
(D)None of the above

Answer: (C)

Solution

The anomalous configuration of Cr arises from the extra (exchange) stability associated with a half-filled -subshell.

Question ID VK-132702