atomic-number-2

Nouns

  • (n) a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) He, helium,

Synonyms

He helium

Words of close approximity

atomic number 20 atomic number 21 atomic number 22 atomic number 23 atomic number 24 atomic number 25 atomic number 26 atomic number 27 atomic number 28 atomic number 29