Xe has 8 electrons in its valence shell.
Electronic configuration of xenon is 1s² 2p⁶
In bonding of XeF₄:
Atomic orbitals that are involved are shown in the attached image:
As the image shows the orbitals that are involved are s, p and d orbitals and the hybridization will be sp³d². As xenon has 8 valence electrons that on excited state shifts to d orbital and make bond with fluorine atom 4 fluorine atom are bonded to xenon by direct sigma bind using 4 xenon electrons rest 4 electrons serves as two lone pairs.
