In which of the following species maximum atom can lie in same plane ?

Options

A. `XeF_(2)O_(2)`
B. `PCl_(5)`
C. `AsH_(4)^(+)`
D. `XeF_(4)`

Explanation

To determine which species has the maximum number of atoms lying in the same plane, we will analyze each option step by step.

### Step 1: Analyze XeF2O2
- **Central Atom**: Xenon (Xe)
- **Hybridization**: sp³d (due to the presence of 2 double bonds and 1 lone pair)
- **Molecular Geometry**: Trigonal bipyramidal
- **Atoms in the Same Plane**: In this structure, the two oxygen atoms and the xenon atom can lie in the same plane. Therefore, a maximum of **3 atoms** can be in the same plane.

### Step 2: Analyze PCl5
- **Central Atom**: Phosphorus (P)
- **Hybridization**: sp³d
- **Molecular Geometry**: Trigonal bipyramidal
- **Atoms in the Same Plane**: In this structure, the phosphorus atom and three chlorine atoms can lie in the same plane. Therefore, a maximum of **4 atoms** can be in the same plane.

### Step 3: Analyze AsH4
- **Central Atom**: Arsenic (As)
- **Hybridization**: sp³
- **Molecular Geometry**: Tetrahedral
- **Atoms in the Same Plane**: In a tetrahedral structure, only three atoms can lie in the same plane at any time. Therefore, a maximum of **3 atoms** can be in the same plane.

### Step 4: Analyze XeF4
- **Central Atom**: Xenon (Xe)
- **Hybridization**: sp³d²
- **Molecular Geometry**: Octahedral
- **Atoms in the Same Plane**: In this structure, four fluorine atoms and the xenon atom can lie in the same plane. Therefore, a maximum of **5 atoms** can be in the same plane.

### Conclusion
After analyzing all the options:
- XeF2O2: 3 atoms
- PCl5: 4 atoms
- AsH4: 3 atoms
- XeF4: 5 atoms

The species with the maximum number of atoms lying in the same plane is **XeF4** with **5 atoms**.

### Final Answer
**D) XeF4**