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fluorine$29044$ - traduzione in greco
IMAGING
Fluorine-19; Fluorine-17; Isotopes of Fluorine; Fluorine-14; Fluorine-15; Fluorine-16; Fluorine-20; Fluorine-21; Fluorine-22; Fluorine-23; Fluorine-24; Fluorine-25; Fluorine-26; Fluorine-27; Fluorine-28; Fluorine-29; Fluorine-31; Fluorine-30; Fluorine-18m; Fluorine isotopes; Fluorine-13; Fluorine isotope
fluorine
n. φθόριο
Definizione
Fluorine
·noun A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared nor kept in glass vessels. If set free it immediately attacks the containing material, so that it was not isolated until 1886. It is a pungent, corrosive, colorless gas. Symbol F. Atomic weight 19.
Wikipedia
Isotopes of fluorine
Fluorine (9F) has 18 known isotopes ranging from 13
F
to 31
F
(with the exception of 30
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 mononuclidic element.
The longest-lived radioisotope is 18
F
; it has a half-life of 109.734(8) min. All other fluorine isotopes have half-lives of less than a minute, and most of those less than a second. The least stable known isotope is 14
F
, whose half-life is 500(60) yoctoseconds, corresponding to a resonance width of 910(100) keV.
