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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-205 atom
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Accession:CHEBI:37365 term browser browse the term
Definition:The radioactive isotope of polonium with relative atomic mass 204.981165 and half-life of 1.66 h.
Synonyms:related_synonym: (205)84Po;   (205)Po;   Formula=[205Po];   InChI=1S/Po/i1-4;   InChIKey=HZEBHPIOVYHPMT-AHCXROLUSA-N;   SMILES=[205Po];   polonium, isotope of mass 205;   polonium-205
 xref: CAS:16729-76-3

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Path 1
Term Annotations click to browse term
  CHEBI ontology 21802
    chemical entity 21800
      atom 21788
        metal atom 18317
          polonium atom 0
            polonium-205 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 21802
    subatomic particle 21788
      composite particle 21788
        hadron 21788
          baryon 21788
            nucleon 21788
              atomic nucleus 21788
                atom 21788
                  main group element atom 21705
                    p-block element atom 21705
                      chalcogen 20868
                        polonium atom 0
                          polonium-205 atom 0
paths to the root