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CHEBI ONTOLOGY - ANNOTATIONS

The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/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-4 atom
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Accession:CHEBI:30219 term browser browse the term
Definition:The stable isotope of helium with relative atomic mass 4.002603. The most abundant (99.99 atom percent) isotope of naturally occurring helium.
Synonyms:related_synonym: (4)2He;   (4)He;   Formula=[4He];   InChI=1S/He/i1+0;   InChIKey=SWQJXJOGLNCZEY-IGMARMGPSA-N;   SMILES=[4He];   helium-4
 xref: Gmelin:14207



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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 19880
    subatomic particle 19878
      nuclear particle 19878
        atomic nucleus 19878
          alpha-particle 0
            helium-4 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19880
    subatomic particle 19878
      composite particle 19878
        hadron 19878
          baryon 19878
            nucleon 19878
              atomic nucleus 19878
                atom 19878
                  main group element atom 19817
                    main group molecular entity 19817
                      gas molecular entity 18472
                        noble gas atom 46
                          noble gas molecular entity 6
                            helium molecular entity 0
                              elemental helium 0
                                monoatomic helium 0
                                  helium(2+) 0
                                    alpha-particle 0
                                      helium-4 atom 0
paths to the root