Related Clues:
- Rare gas
- It's under krypton on the periodic table
- Arc-lamp gas
- Poisonous gas
- Heaviest of the noble gases
- Gas of concern to homeowners
- Gas in arc lamps
- 1980s Big Apple nightclub with a chemical name
- Dangerous household gas
- Photographic flash gas
- TV-tube material
- Element tested for in home inspections
- Gas used in arc lamps
- A 33 Across
- Unwelcome house gas