Which of the following has a geometry different from the other three species (having the same geometry) ?

Options

A. `BF_(4)^(-)`
B. `SO_(4)^(2-)`
C. `XeF_(4)`
D. `PH_(4)^(+)`

Explanation

To determine which of the following species has a geometry different from the other three, we need to analyze the molecular geometry of each species mentioned in the video transcript.

### Step-by-Step Solution:

1. **Identify the Species**: The species mentioned in the transcript are likely to include Boron trifluoride (BF3), Sulfate ion (SO4^2-), Xenon tetrafluoride (XeF4), and Phosphorus trichloride (PCl3).

2. **Determine the Valence Electrons**:
- **Boron (B)**: 3 valence electrons.
- **Sulfur (S)**: 6 valence electrons.
- **Xenon (Xe)**: 8 valence electrons.
- **Phosphorus (P)**: 5 valence electrons.

3. **Calculate Bonding and Lone Pairs**:
- **BF3**: Boron forms 3 bonds with fluorine, no lone pairs. Geometry: Trigonal planar.
- **SO4^2-**: Sulfur forms 4 bonds with oxygen, no lone pairs. Geometry: Tetrahedral.
- **XeF4**: Xenon forms 4 bonds with fluorine and has 2 lone pairs. Geometry: Octahedral (but molecular shape is square planar).
- **PCl3**: Phosphorus forms 3 bonds with chlorine and has 1 lone pair. Geometry: Trigonal pyramidal.

4. **Compare Geometries**:
- BF3: Trigonal planar
- SO4^2-: Tetrahedral
- XeF4: Square planar (octahedral geometry)
- PCl3: Trigonal pyramidal

5. **Identify the Different Geometry**:
- The geometries of BF3, SO4^2-, and PCl3 are different from XeF4.
- Therefore, **XeF4** has a geometry that is different from the other three species.

### Final Answer:
**XeF4 has a geometry different from the other three species (BF3, SO4^2-, and PCl3) which have trigonal planar, tetrahedral, and trigonal pyramidal geometries respectively.**