{"term":{"id":"01022","title":"chemical element","longtitle":"IUPAC Gold Book - chemical element","doi":"10.1351\/goldbook.C01022","code":"C01022","status":"current","synonym":"<em>synonym<\/em>: element","definitions":[{"id":1,"text":"A species of atoms; all atoms with the same number of protons in the atomic nucleus.A pure chemical substance composed of atoms with the same number of protons in the atomic nucleus. Sometimes this concept is called the elementary substance as distinct from the chemical element as defined under (1), but mostly the term chemical element is used for both concepts.","links":[{"term":"chemical substance","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C01039"},{"term":"nucleus","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/N04256"}],"sources":["Red Book, 3rd ed., p. 35"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/C01022\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/C01022\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/C01022\/plain"},"citation":"Citation: 'chemical element' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.C01022","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-06-30T08:01:11+00:00"}}