Which of the following does not belong to 3d series of transition elements?

Options

A. Titanium
B. Iron
C. Palladium
D. Vanadium

Answer

To determine which of the given elements does not belong to the 3d series of transition elements, we can follow these steps:

### Step 1: Identify the Elements
The options given are:
- Titanium (Ti)
- Iron (Fe)
- Palladium (Pd)
- Vanadium (V)

### Step 2: Understand the 3d Series
The 3d series of transition elements includes the elements from Scandium (Sc, atomic number 21) to Zinc (Zn, atomic number 30). The elements in this series are:
- Scandium (Sc, 21)
- Titanium (Ti, 22)
- Vanadium (V, 23)
- Chromium (Cr, 24)
- Manganese (Mn, 25)
- Iron (Fe, 26)
- Cobalt (Co, 27)
- Nickel (Ni, 28)
- Copper (Cu, 29)
- Zinc (Zn, 30)

### Step 3: Analyze Each Element
- **Titanium (Ti)**: Atomic number 22, belongs to the 3d series.
- **Iron (Fe)**: Atomic number 26, belongs to the 3d series.
- **Vanadium (V)**: Atomic number 23, belongs to the 3d series.
- **Palladium (Pd)**: Atomic number 46, does not belong to the 3d series; it is part of the 4d series.

### Step 4: Conclusion
Since Palladium (Pd) has an atomic number of 46 and is not part of the 3d series, it is the correct answer.

**Final Answer**: Palladium (Pd) does not belong to the 3d series of transition elements.

---