Answer
Gases as elements: $Xe$, $Kr$, $Ar$, $He$ and $Ne$
Gases as compounds: $SO_2$, $CH_4$, $CO_2$, $NO_2$ and $CO$
Work Step by Step
The names of five elements that exist as gases at room temperature are: $Xe$, $Kr$, $Ar$, $He$ and $Ne$.
Similarly, the names of the five compounds that exist as gases at room temperature are: $SO_2$, $CH_4$, $CO_2$, $NO_2$ and $CO$.
