The number of electrons in 3d shell for element with atomic number 26 is

Options

A. 4
B. 6
C. 8
D. 10

Explanation

To determine the number of electrons in the 3d shell for the element with atomic number 26, follow these steps:

### Step-by-Step Solution:

1. **Identify the Element**:
The atomic number 26 corresponds to the element Iron (Fe).

2. **Write the Electron Configuration**:
The electron configuration for Iron (atomic number 26) can be written as:
\[ 1s^2 \, 2s^2 \, 2p^6 \, 3s^2 \, 3p^6 \, 4s^2 \, 3d^6 \]

3. **Count the Electrons in Each Shell**:
- 1s shell: 2 electrons
- 2s shell: 2 electrons
- 2p shell: 6 electrons
- 3s shell: 2 electrons
- 3p shell: 6 electrons
- 4s shell: 2 electrons
- 3d shell: 6 electrons

4. **Identify the Electrons in the 3d Shell**:
From the electron configuration, we see that the 3d shell has **6 electrons**.

5. **Conclusion**:
Therefore, the number of electrons in the 3d shell for the element with atomic number 26 (Iron) is **6**.

### Final Answer:
The number of electrons in the 3d shell for the element with atomic number 26 is **6**.

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