Noble gases are a group of elements that exhibit which of the following?

The low chemical reactivity of the rare gases can be attributed to their

$Xe_{(g)} + 2 F_{2(g)} \xrightarrow[7 \text{ bar }]{873 \text{ K}} XeF_{4(s)}$
The ratio of $Xe : F_2$ required in the above reaction is

The density of nitrogen prepared from air is slightly higher than that of nitrogen prepared from chemical compounds. This is due to the presence of which of the following in nitrogen obtained from air?

The synthetically produced radioactive noble gas by the collision of ${}_{98}^{249}Cf$ with ${}_{20}^{48}Ca$ is

The noble gas which forms the maximum number of compounds is