Answer: argon

AnswerCrossword Clue
ARGON

Light-bulb gas

ARGON

Colorless gas

ARGON

About 1% of the atmosphere

ARGON
Inert gas
ARGON
Noble gas
ARGONBulb gas
ARGONRadio-tube element
ARGONGas in incandescent bulbs
ARGONBulb filler
ARGONAbout one percent of air
ARGONFluorescent bulb filler
ARGONA noble gas
ARGONVacuum tube filler
ARGONAlmost 1% of the Earth's atmosphere
ARGONFluorescent bulb gas
ARGONIncandescent bulb gas
ARGONAbout 1% of the Earth's atmosphere
ARGONFirst noble gas discovered
ARGONInert gas used in vacuum tubes
ARGONVacuum tube gas
ARGONFluorescent lamp filler
ARGONIncandescent lamp gas
ARGONGas in incandescent lamps
ARGONIt fills fluorescent and incandescent lamps
ARGONEarth's most abundant noble gas
ARGONLight gas
ARGONRoughly 1% of the atmosphere
ARGONGas used in arc welding
ARGONLight bulb gas
ARGONFluorescent tube gas
ARGONInert gas used in welding
ARGONAbout 1% of what you just inhaled
ARGONCommon inert gas
ARGONYou just inhaled some
ARGONThird most common gas in Earth's atmosphere
ARGONElement immediately below neon on the periodic table
ARGONElement under neon on the periodic table
ARGONFluorescent lamp gas
ARGONVolcanic gas
ARGONOne of the noble gases