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 (synonym) argon, Ar (hypernym) chemical element, element (substance-holonym) air | ||||
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Atomic number 18 Definition from Language, Idioms & Slang Dictionaries & Glossaries
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atomic number 18
atomic number 18
n : a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere [syn: argon, ar]
atomic number 18
n : a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere [syn: argon, ar]