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Crossword clue: a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

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argon 5 letters wn-def

a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

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A substance regarded as an element, contained in the atmosphere and remarkable for its chemical inertness. Rayleigh and Ramsay.Chemical element with symbol Ar