monoatomic monocation elemental gold gold(1+) 196.96655 196.967 Au Au(+) CAS:20681-14-5 CHEBI:30029 CHEBI:49480 CHEBI:49482 GOLD ION InChI=1S/Au/q+1 PDBeChem:AU ZBKIUFWVEIBQRT-UHFFFAOYSA-N [Au+] chebi_ontology gold(1+) gold(1+) ion gold(I) cation gold, ion(1+)