zinc group element atom copernicium atom 0 0.00000 112Cn 112Cp 112Uub A zinc group element atom with a symbol Cn and atomic number 112. All its isotopes are intensely radioactive. Prior to its discovery, it had the placeholder name ununbium (in accordance with IUPAC recommendations). Following its discovery (in Darmstadt, 1996) and subsequent confirmation, the name copernicium was adopted in 2010. CHEBI:33517 Cn Cn InChI=1S/Cn NOTIIDSZELDPOP-UHFFFAOYSA-N NaN Uub Wikipedia:Copernicium [Cn] chebi_ontology copernicium ununbium 鎶 Kopernikum copernico copernico copérnicum