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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC BY 3.0, For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.

Term:polonium-210 atom
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Accession:CHEBI:37340 term browser browse the term
Definition:The radioactive isotope of polonium with relative atomic mass 209.98286 and half-life of 138.376 days; the only naturally occurring isotope of polonium.
Synonyms:related_synonym: (210)84Po;   (210)Po;   Formula=[210Po];   InChI=1S/Po/i1+1;   InChIKey=HZEBHPIOVYHPMT-OUBTZVSYSA-N;   SMILES=[210Po];   polonium, isotope of mass 210;   polonium-210
 xref: CAS:13981-52-7;   Gmelin:76756

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 25189
    chemical entity 25160
      atom 25151
        metal atom 19893
          polonium atom 0
            polonium-210 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 25189
    subatomic particle 25151
      composite particle 25151
        hadron 25151
          baryon 25151
            nucleon 25151
              atomic nucleus 25151
                atom 25151
                  main group element atom 25031
                    p-block element atom 25031
                      chalcogen 23963
                        polonium atom 0
                          polonium-210 atom 0
paths to the root