Definition of Atomic Number 18 in English :
Define Atomic Number 18 in English
Atomic Number 18 meaning in English
Meaning of Atomic Number 18 in English
Pronunciation of Atomic Number 18 in English
Atomic Number 18 pronunciation in English
Pronounce Atomic Number 18 in English
Atomic Number 18
see synonyms of atomic number 18Noun
1. ar, argon, atomic number 18
a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
WordNet Lexical Database for English. Princeton University. 2010.