polonium atom polonium-208 atom (208)Po HZEBHPIOVYHPMT-BJUDXGSMSA-N chebi_ontology 0 207.981 CHEBI:37368 The radioactive isotope of polonium with relative atomic mass 207.98123 and half-life of 2.898 years. (208)84Po polonium-208 InChI=1S/Po/i1-1 207.98123 [208Po] [208Po] polonium-208