atomic number 18

Noun
Synonyms: argonAr

Open English WordNet

Noun (1)

  1. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphereSynonyms: argonArType of noble gas, inert gasSubstance of air
Word of the day · Nov 8About this word
verboseadjective

What does it mean? Question 1 of today’s quiz

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