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Definition of Atomic number 2
1. Noun. 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).
Exact synonyms: He, Helium
Generic synonyms: Chemical Element, Element, Argonon, Inert Gas, Noble Gas
Generic synonyms: Chemical Element, Element, Argonon, Inert Gas, Noble Gas
Lexicographical Neighbors of Atomic Number 2
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