has role is deprotonated form of gas molecular entity dinitrogen CHEBI:14660 CHEBI:17997 CHEBI:13388 molecular nitrogen chebi_ontology An elemental molecule consisting of two trivalently-bonded nitrogen atoms. N2 Nitrogen Nitrogen N(2) CHEBI:25365 N#N CHEBI:43128 CHEBI:7593 elemental molecule diazynium diatomic nitrogen food packaging gas food propellant