If `AB_(4)^(n),` type species are tetrahedral, then which of the following is incorrectly matched ?

Options

A. `{:(A,B,C,),(Xe,O,Zero,):}`
B. `{:(A,B,C,),(Se,F,Zero,):}`
C. `{:(A,B,C,),(P,O,-3,):}`
D. `{:(A,B,C,),(N,H,+1,):}`

Explanation

To determine which of the following species is incorrectly matched as tetrahedral in the `AB4` type, we will analyze each option provided:

1. **Xenon Tetraoxide (XeO4)**:
- Xenon (Xe) is the central atom and forms four bonds with oxygen (O).
- There are no lone pairs on the xenon atom.
- The molecular geometry is tetrahedral because it has four bonding pairs and no lone pairs.
- **Conclusion**: Correctly matched as tetrahedral.

2. **Sulfur Tetrafluoride (SF4)**:
- Sulfur (S) is the central atom and forms four bonds with fluorine (F).
- However, sulfur has one lone pair.
- The molecular geometry is not tetrahedral; it adopts a seesaw shape due to the presence of the lone pair.
- **Conclusion**: Incorrectly matched as tetrahedral.

3. **Phosphate Ion (PO4^3-)**:
- Phosphorus (P) is the central atom and forms four bonds with oxygen (O).
- There are no lone pairs on the phosphorus atom.
- The molecular geometry is tetrahedral because it has four bonding pairs and no lone pairs.
- **Conclusion**: Correctly matched as tetrahedral.

4. **Ammonium Ion (NH4^+)**:
- Nitrogen (N) is the central atom and forms four bonds with hydrogen (H).
- There are no lone pairs on the nitrogen atom.
- The molecular geometry is tetrahedral because it has four bonding pairs and no lone pairs.
- **Conclusion**: Correctly matched as tetrahedral.

### Final Answer:
The incorrectly matched species is **Sulfur Tetrafluoride (SF4)**.