If Aufbau rule is not followed, what are the blocks of the following elements?
Fe (26)

Explanation

To determine the block of the element Iron (Fe) with atomic number 26 when the Aufbau principle is not followed, we need to analyze the electron configuration step by step.

### Step-by-Step Solution:

1. **Understanding the Aufbau Principle**:
The Aufbau principle states that electrons fill atomic orbitals starting from the lowest energy level to the highest. The order of filling is generally 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, and so on.

2. **Electron Configuration of Iron (Fe)**:
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