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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 21797
    chemical entity 21795
      atom 21783
        metal atom 18323
          polonium atom 0
            polonium-210 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 21797
    subatomic particle 21783
      composite particle 21783
        hadron 21783
          baryon 21783
            nucleon 21783
              atomic nucleus 21783
                atom 21783
                  main group element atom 21701
                    p-block element atom 21701
                      chalcogen 20873
                        polonium atom 0
                          polonium-210 atom 0
paths to the root