The elements with atomic numbers $10$,$18$,$36$,$54$,and $86$ are all

In a compound formed by $Xe$ and $F$,the mass percentage of $Xe$ $(M=133)$ is $63.8\%$. The oxidation state of $Xe$ in this compound is ..........

Which of the following is employed in flash tubes in photography?

The reason for the noble gases to have low boiling and low melting points is:

The hybridisation and structure of $XeF_6$ is :

The number of peroxide bonds in the perxenate ion $[XeO_6]^{4-}$ is ........