Calculate the spin only magentic moment of `M^(2+)` ion `(Z=27)`.

Explanation

To calculate the spin-only magnetic moment of the \( M^{2+} \) ion (where \( Z = 27 \)), we will follow these steps:

### Step 1: Determine the Electronic Configuration
The atomic number \( Z = 27 \) corresponds to the element Cobalt (Co). The electronic configuration of Co is:
\[ \text{Co: } [\text{Ar}] \, 3d^7 \, 4s^2 \]

When cobalt loses two electrons to form \( M^{2+} \), the electrons are removed first from the 4s orbital, leading to the following configuration:
\[ M^{2+}: [\text{Ar}] \, 3d^7 \]
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