In the complex ion `ML_6^(n+)`, `M^(n+)` has five d-electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Options

A. (a) `0`
B. (b) `5`
C. (c) `2`
D. (d) `3`

Answer

B

Explanation

`M^(+n)` has five d electrons and L is a weak ligand, then it cannot force electron to be paired up.

Then unpaired electrons will be 5.