What is the trend in the atomic radii of noble gases as we move down the group?

Which noble gas has the lowest boiling point?

Which of the following compounds of Xenon has a pyramidal geometry?

The oxidation state of $Xe$ in $XeO_3$ and the bond angle in it respectively are:

Which of the following compounds is square planar?

Give the formula and describe the structure of a noble gas species which is isostructural with:
$(i)$ $ICl_{4}^{-}$
$(ii)$ $IBr_{2}^{-}$
$(iii)$ $BrO_{3}^{-}$