Engelsk navneord: atomic number 2 | |||
1. | atomic number 2 (om masse el. substans) 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) | ||
Termer med samme betydning (synonymer) | He, helium | ||
Mindre specifikke termer | argonon, chemical element, element, inert gas, noble gas | ||