Which of the element is not a typical transition element ?
Fe ; Pd ; Cr ; Zn

Options

A. Fe
B. Pd
C. Cr
D. Zn

Answer

To determine which of the given elements is not a typical transition element, we need to analyze the electronic configurations of each element and understand the criteria for being a transition element.

### Step-by-Step Solution:

1. **Understand the Definition of Transition Elements**:
Transition elements are defined as elements that have partially filled d-orbitals in their elemental state or in one of their common oxidation states.

2. **List the Elements and Their Atomic Numbers**:
- Iron (Fe) - Atomic Number 26
- Palladium (Pd) - Atomic Number 46
- Chromium (Cr) - Atomic Number 24
- Zinc (Zn) - Atomic Number 30

3. **Determine the Electronic Configurations**:
- **Iron (Fe)**:
- Electronic Configuration: [Ar] 3d^6 4s^2
- **Palladium (Pd)**:
- Electronic Configuration: [Kr] 4d^10
- **Chromium (Cr)**:
- Electronic Configuration: [Ar] 3d^5 4s^1
- **Zinc (Zn)**:
- Electronic Configuration: [Ar] 3d^10 4s^2

4. **Analyze Each Element**:
- **Iron (Fe)**: Has partially filled d-orbitals (3d^6), thus it is a typical transition element.
- **Palladium (Pd)**: In its elemental state, it has a fully filled d-orbital (4d^10). However, in its common oxidation state (+2), it has 4d^8, which is partially filled. Therefore, it can be considered a transition element.
- **Chromium (Cr)**: Has partially filled d-orbitals (3d^5), thus it is a typical transition element.
- **Zinc (Zn)**: In its elemental state, it has fully filled d-orbitals (3d^10). In its common oxidation state (+2), it has 3d^10 4s^0, which means it does not have any partially filled d-orbitals. Therefore, it does not behave as a typical transition element.

5. **Conclusion**:
Based on the analysis, the element that is not a typical transition element is **Zinc (Zn)**.

### Final Answer:
**Zinc (Zn)** is not a typical transition element.