$\mathrm{X}\mathrm{e}{\mathrm{O}}_4$ molecule is tetrahedral having 'x' number of $\mathrm{p}\mathrm{\pi }-\mathrm{d}\mathrm{\pi }$ bonds. The value of ' $\mathrm{x}$ ' is.

Xenon undergo $\text{s}{\text{p}}^3$ hybridization.



In the fourth excited state xenon atom, has 8 unpaired electrons



One s and three p orbital undergo ${\mathrm{s}\mathrm{p}}^3$ hybridization. Four $\mathrm{s}{\mathrm{p}}^3$ hybrid orbitals form four $\sigma$ bonds with oxygen atoms. They are $\mathrm{\sigma }\mathrm{ }{\mathrm{s}\mathrm{p}}^3\mathrm{ }–\mathrm{p}$ . Four $\mathrm{p}\mathrm{\pi }-\mathrm{d}\mathrm{\pi }$ bonds are also formed with oxygen atoms by the unpaired electrons.