Predict the number of unpaired electrons in square planar `[PtCI_(4)]^(2-)` ion .

Explanation

To determine the number of unpaired electrons in the square planar \([PtCl_4]^{2-}\) ion, we can follow these steps:

### Step 1: Determine the Oxidation State of Platinum
Let the oxidation state of platinum be \(X\). Since there are 4 chloride ions (each with a charge of -1), the total charge contributed by the chlorides is -4. The overall charge of the complex ion is -2. Therefore, we can set up the equation:

\[ X + 4(-1) = -2 \]
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