Definition that contains inert gas
- he a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
- ne a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
- ar a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
- neon a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
- helium a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
- kr a colorless element that is one of the six inert gasses; occurs in trace amounts in air
- krypton a colorless element that is one of the six inert gasses; occurs in trace amounts in air
- argon a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
- rn a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
- radon a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health