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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:helium-6 atom
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Accession:CHEBI:37003 term browser browse the term
Definition:The radioactive isotope of helium with relative atomic mass 6.01889 and half-life of 806.7 ms.
Synonyms:related_synonym: (6)2He;   (6)He;   Formula=[6He];   InChI=1S/He/i1+2;   InChIKey=SWQJXJOGLNCZEY-NJFSPNSNSA-N;   SMILES=[6He];   helium-6

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Path 1
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  CHEBI ontology 19908
    chemical entity 19906
      atom 19906
        s-block element atom 19684
          helium atom 0
            helium-6 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19908
    subatomic particle 19906
      composite particle 19906
        hadron 19906
          baryon 19906
            nucleon 19906
              atomic nucleus 19906
                atom 19906
                  main group element atom 19853
                    main group molecular entity 19853
                      gas molecular entity 18472
                        noble gas atom 46
                          helium atom 0
                            helium-6 atom 0
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