| Answer | Crossword Clue |
|---|---|
| AERIFORM | Light as gases |
| NEONS | Light gases |
| VENTED | Discharged, as gases |
| INERT | Not reactive, as gases |
| INERT | Nonreactive, as some gases |
| INERT | Not reactive, as some gases |
| RARER | Thinner in density, as gases |
| ADSORB | Collect in condensed form, as gases |
