Why `NF_(3)` pyramidal but `BF_(3)` is triangular planar ?

Explanation

To understand why NF₃ is pyramidal while BF₃ is trigonal planar, we need to analyze the molecular geometry and hybridization of both molecules step by step.

### Step 1: Determine the Lewis Structure
- **NF₃ (Nitrogen Trifluoride)**:
- Nitrogen (N) is the central atom with three fluorine (F) atoms bonded to it.
- Nitrogen has one lone pair of electrons.

- **BF₃ (Boron Trifluoride)**:
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