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atomic number 18 meaning and definition

Definition and meaning of atomic number 18 at MeaningMonkey.org. atomic number 18 meaning and definition in the English Dictionary.

ATOMIC NUMBER 18 noun

Definition of 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
Source: Princeton University Wordnet
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