Term Name:	roentgenium atom
Synonyms:	111Rg, Rg, roentgenio, roentgenium, unununium, Uuu
Definition:	A copper group element atom with atomic number 111. The the ninth member of the 6d series of transition metals, it is an extremely radioactive, synthetic element. Average mass is around 281.
Ontology:	ChEBI [CHEBI:33368]  ( EBI )