Question

Write all four quantum number of the last electron of Cr ​

Answer 1

Answer:

Principal Q. No: 4

Angular momentum or Azimuthal Q. No: 0

Magnetic Q. No: 0

Spin Q. No: $\frac{+1}{2}$

Explanation:

The electronic configuration of Chromium is [Ar] 3d⁵ 4s¹ . So, the last electron is in the 4s orbital.

Therefore, the following are the quantum numbers of the last electron of Cr

Principal Q. No: 4

Angular momentum or Azimuthal Q. No: 0

Magnetic Q. No: 0

Spin Q. No: $\frac{+1}{2}$