The effective atomic number of Fe in` Fe(CO)_(5)` is

Explanation

To find the effective atomic number of iron (Fe) in the complex compound Fe(CO)5, we will follow these steps:

### Step 1: Identify the oxidation state of iron in Fe(CO)5
- In the complex Fe(CO)5, carbon monoxide (CO) is a neutral ligand, meaning it does not contribute to the charge of the complex.
- Since the entire compound is neutral, the oxidation state of iron (Fe) must be 0.

### Step 2: Determine the atomic number of iron
- The atomic number (Z) of iron (Fe) is 26.
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