Answer: argon

AnswerCrossword Clue
ARGONElement whose name roughly means "lazy"
ARGONElement in electric bulbs.
ARGONGas used in light bulbs, radio tubes, etc.
ARGONElement in air.
ARGONGaseous element.
ARGONGas used in light bulbs.
ARGONInert gas.
ARGONGaseous element in the air.
ARGONRadio tube gas.
ARGONElement.
ARGONGaseous element
ARGONInactive gas
ARGONGas used in light tubes
ARGONInert gaseous element
ARGONGaseous element in our atmosphere
ARGONAbout 1 percent of the atmosphere
ARGONInert element
ARGONElement in radio tubes
ARGONA gaseous element
ARGONFluorescent-lamp filler
ARGONRadio tube gas
ARGONScientific discovery of 1894
ARGONNumber 18
ARGONPart of the atmosphere
ARGONIt's inert
ARGONLaser gas
ARGONElement whose name comes from Greek for "inactive"
ARGONIts atomic number is 18
ARGONGas in incandescent lamps, perhaps
ARGONAbout 1 percent of the Earth's atmosphere
ARGONCommon inert gas in the atmosphere
ARGONThird-most common gas in the atmosphere
ARGONMost common of the noble gases
ARGONMost abundant noble gas in the atmosphere
ARGONThird-most abundant gas in the atmosphere
argoninert gas
argoncolorless, odorless, chemically inactive, monatomic, gaseous element that, because of its inertness, is used for filling fluorescent and incandescent lamps and vacuum tubes. Symbol: Ar; at. no.: 18; at. wt.: 39.948
ARGONIt's a gas
ARGONNeighbor of krypton on the periodic table
ARGONFirst noble gas to be discovered