Which of the following noble gases does not have an octet of electrons in its outermost shell?

The difference in the oxidation state of $Xe$ between the oxidized product of $Xe$ formed on complete hydrolysis of $XeF_4$ and $XeF_4$ is

$XeF_{6}$ on partial hydrolysis gives a compound $X$,which has square pyramidal geometry. '$X$' is

Noble gases do not react with other elements because.......

The most abundant noble gas in the atmosphere is

Noble gases are a group of elements which exhibit very: