How many unpaired electrons are present in each of the following ?
`Fe^(3+) , Co^(2+) , Zn^(2+)`

Explanation

To determine the number of unpaired electrons in the ions \( \text{Fe}^{3+} \), \( \text{Co}^{2+} \), and \( \text{Zn}^{2+} \), we will follow these steps:

### Step 1: Write the electron configuration of the neutral atoms.
1. **Iron (Fe)**: The atomic number of iron is 26. Its electron configuration is:
\[ \text{Fe}: [\text{Ar}] \, 3d^6 \, 4s^2 \]

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