Isotopes of fluorine
| ||||||||||||||||||||||||||
| Standard atomic weight Ar°(F) | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Fluorine (9F) has 19 known isotopes ranging from 13
F to 31
F and two isomers (18m
F and 26m
F). Only fluorine-19 is stable and naturally occurring in more than trace quantities; therefore, fluorine is a monoisotopic and a mononuclidic element.
The longest-lived radioisotope is 18
F with a half-life of 109.734 u=minutes, followed by 17
F with 64.37 seconds. All other fluorine isotopes have half-lives of less than 12 seconds, and most of those less than 1/2 second. These unstable isotopes of fluorine, however, participate in the CNO cycle within stars.
- ^ "Standard Atomic Weights: Fluorine". CIAAW. 2021.
- ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.