Question

Anomalous electronic configuration in the 3d series are of a) Cr and Fe b) Cu and Zn c) Fe and Cu d) Cr and Cu

Answer 1

Answer:

cr and fe

Explanation:

Answer 2

Chromium (Cr) and Copper (Cu) show an anomalous electronic configuration in the 3d series. (Option d is correct)

• Expected Electronic configuration of Cr - [Ar] 3d⁴ 4s²                               Actual Electronic configuration of Cr - [Ar] 3d⁵ 4s¹                                    It happens because Chromium achieves a half-filled stable configuration by filling the d orbital with 5 electrons.
• Expected Electronic configuration of Cu - [Ar] 3d⁹ 4s²                              Actual Electronic configuration of Cr - [Ar] 3d¹⁰ 4s¹                                It happens because Copper achieves a full-filled stable configuration by filling all the d orbital.

#SPJ3