What is the ground-state electronic configuration of chromium (Z = 24)?
Correct answer D. [Ar] 3d⁵ 4s¹
Explanation
Chromium is an exception to the Aufbau order. A half-filled 3d⁵ subshell with 4s¹ is more stable because of symmetry and exchange energy, so 3d⁵4s¹ is preferred to 3d⁴4s².
Answer checked How we write and check questions
Discussion