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Meaning of ATOMIC NUMBER 18

 
WordNet Dictionary
 
 Definition: 
[n]  a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
 
 Synonyms: Ar, argon
 
 See Also: air, argonon, chemical element, element, inert gas, noble gas

 

 

 

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