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Atomic number 18   Listen
Atomic number 18

noun
1.
A colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere.  Synonyms: Ar, argon.





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Words linked to "Atomic number 18" :   air, noble gas, element, chemical element, ar, argonon, inert gas, argon


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