**Total Number of Nodal Planes in d Orbitals Used in the Hybridization of XeF2 Molecule**

To determine the total number of nodal planes in the d orbitals used in the hybridization of the XeF2 molecule, we first need to understand the hybridization process and the molecular geometry of XeF2.

**Hybridization Process:**
Hybridization is a concept used to describe the mixing of atomic orbitals to form new hybrid orbitals. The hybrid orbitals are formed to accommodate the bonding electrons in a molecule and determine its molecular geometry.

In the case of the XeF2 molecule, the central atom Xenon (Xe) undergoes hybridization to form sp3d hybrid orbitals. This hybridization involves the mixing of one 5s orbital, three 5p orbitals, and one 5d orbital to form five sp3d hybrid orbitals.

**Molecular Geometry of XeF2:**
The molecular geometry of XeF2 is linear, with the Xenon atom at the center and two Fluorine atoms on either side. The two Fluorine atoms are bonded to the central Xenon atom, resulting in a linear arrangement.

**Total Number of Nodal Planes:**
To determine the total number of nodal planes in the d orbitals used in the hybridization of XeF2, we need to consider the number of nodal planes in each of the five d orbitals involved in the hybridization.

The d orbitals include dxy, dxz, dyz, dx2-y2, and dz2. Each of these orbitals has a different shape and orientation in space, resulting in a varying number of nodal planes.

1. dxy orbital: This orbital has a lobed shape, and it does not have any nodal planes. It is oriented in the xy plane.

2. dxz and dyz orbitals: These orbitals have a lobed shape and contain one nodal plane each. They are oriented in the xz and yz planes, respectively.

3. dx2-y2 orbital: This orbital has a dumbbell shape and contains two nodal planes. It is oriented along the x and y axes.

4. dz2 orbital: This orbital has a doughnut shape and contains one nodal plane. It is oriented along the z-axis.

Therefore, in the hybridization of XeF2, the total number of nodal planes in the d orbitals used is 2 + 1 + 1 + 2 + 1 = 7.

In conclusion, there are a total of 7 nodal planes in the d orbitals used in the hybridization of the XeF2 molecule.

Zero!!! since dz^2 is used :)