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atomic number 13 |
atomic number 14 |
atomic number 15 |
atomic number 16 |
atomic number 17 |
atomic number 18
| atomic number 19
| atomic number 2
| atomic number 20
| atomic number 21
| atomic number 22
atomic number 18
WORDNET DICTIONARY
Noun atomic number 18 has 1 sense
- atomic number 18(n = noun.substance) ar, argon - a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere; Array is a kind of chemical element, element, argonon, inert gas, noble gas
For further exploring for "atomic number 18" in Webster Dictionary Online
