| Answer | Crossword Clue |
|---|---|
| FUMY | Like noxious gases |
| INERT | Like some gases |
| NONSOLUBLE | Like some gases |
| INERT | Like noble gases |
| INERT | Like some gases. |
| RARE | Like some gases |
| NOBLE | Like some gases |
| STABLE | Like noble gases |
| INERT | Like the noble gases |
| INERT | Nonreactive, like some gases |
| INERT | Non-reactive, like some gases |
| INERT | Like gases in the rightmost column of the periodic table |
