Question

Electron Configurations of Fe²⁺ Cation:

What are the electron configurations of the Fe²⁺ cation in terms of the four quantum numbers?

A) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶
B) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
C) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁶
D) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸

Answer 1

The electron configuration of Fe²⁺ cation is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶.

Step-by-step explanation:

The electron configuration of Fe²⁺ cation is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶. When Fe²⁺ loses two electrons, they are removed from the 4s orbital first, followed by removing electrons from the 3d orbital.