Noble gas
Noble gas noun - Any of the chemically inert gaseous elements of the helium group in the periodic table.
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Synonyms for Noble gas
Radon
Radon noun - 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.
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Including names like "Zenon" and "Nebula", although both those naming conventions and much of the Future Slang are more common on the space station than Earth; in the first movie, one of Zenon's Earth teachers accidentally calls her another noble gas; "Radon".
Source: Film / Zenon
Cite this Source
Radon and Noble gas. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/noble_gas/radon
Noble gas & Radon. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/noble_gas/radon>.
Radon or Noble gas. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/noble_gas/radon.
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