oganesson atom Wikipedia:Oganesson Uuo InChI=1S/Og ununoctium A p-block element atom with a symbol Og and atomic number 118. [Og] 0 Og 294.00000 PMID:23913741 118Og eka-emanation eka-radon E118 PMID:11486061 PMID:19045133 294.000 PMID:10062781 element 118 CHEBI:194541 chebi_ontology GOANEQIZDYDFCO-UHFFFAOYSA-N PMID:36859080 noble gas atom p-block element atom