Fluorine (9F) has 19 known isotopes ranging from 13F to 31F and two isomers (18mF and 26mF). Only fluorine-19 is stable and naturally occurring in more than trace quantities; therefore, fluorine is a monoisotopic and a mononuclidic element.
Fluorine (9F) has 19 known isotopes ranging from 13F to 31F and two isomers (18mF and 26mF). Only fluorine-19 is stable and naturally occurring in more than trace quantities; therefore, fluorine is a monoisotopic and a mononuclidic element.
Source: Wikipedia "Isotopes of fluorine" · CC BY-SA 4.0
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