Related Clues

• Radio tube gas
• Scientific discovery of 1894
• Vacuum tube filler
• About 1% of the atmosphere
• Number 18
• Part of the atmosphere
• Light bulb gas
• Fluorescent lamp filler
• Inert gas
• About 1% of the Earth's atmosphere
• It's inert
• Laser gas
• Element whose name comes from Greek for "inactive"
• Element whose name roughly means "lazy"
• Incandescent lamp gas
• Gas in incandescent lamps
• It fills fluorescent and incandescent lamps
• Roughly 1% of the atmosphere
• Light gas
• Earth's most abundant noble gas