The nitrogen atom of `NH_(3)` acts as a donor during the formation of a co-ordinate covalent bond while the central nitrogen atom in `NO_(2)` cannot act as a donor. Explain.

Explanation

To understand why the nitrogen atom in ammonia (NH₃) acts as a donor during the formation of a coordinate covalent bond, while the nitrogen atom in nitrogen dioxide (NO₂) cannot, we need to analyze the electronic structure and bonding characteristics of both molecules.

### Step-by-Step Solution:

1. **Understanding Coordinate Covalent Bonds**:
- A coordinate covalent bond is formed when one atom donates both electrons to form a bond with another atom. This typically occurs when one atom has a lone pair of electrons available for donation.

2. **Analyzing the Structure of Ammonia (NH₃)**:
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