The number of unpaired electrons in Zn element is

Explanation

To determine the number of unpaired electrons in the zinc (Zn) element, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Atomic Number of Zinc:**
- Zinc has an atomic number of 30.

2. **Write the Electronic Configuration:**
- The electronic configuration of zinc can be written as:
\[ \text{Zn: } [\text{Ar}] 3d^{10} 4s^{2} \]
- Here, [Ar] represents the electron configuration of Argon, which accounts for the first 18 electrons.

3. **Analyze the Orbitals:**
- The 4s orbital can hold a maximum of 2 electrons, and in zinc, it is fully filled (4s²).
- The 3d orbital can hold a maximum of 10 electrons, and in zinc, it is also fully filled (3d¹⁰).

4. **Count the Unpaired Electrons:**
- Since both the 4s and 3d orbitals are fully filled, there are no unpaired electrons in zinc.
- Therefore, the number of unpaired electrons in Zn is:
\[ \text{Number of unpaired electrons} = 0 \]

### Final Answer:
The number of unpaired electrons in zinc (Zn) is **0**.

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