`[CoF_6]^(3-)` is a coordination complex ion.
State the magnetic behaviour of the complex.

Explanation

To determine the magnetic behavior of the coordination complex ion \([CoF_6]^{3-}\), we will follow these steps:

### Step 1: Determine the Oxidation State of Cobalt
In the complex \([CoF_6]^{3-}\), fluorine (F) is a negatively charged ligand with an oxidation state of -1. Since there are six fluorine ligands, their total contribution to the charge is \(6 \times (-1) = -6\). The overall charge of the complex ion is -3.

Let \(x\) be the oxidation state of cobalt (Co). We can set up the equation:
\[
x + (-6) = -3
...