Calculate the mass of fluorine (in g) contained in 55.5 g of copper(II) fluoride. Learn this topic by watching Mass Percent Concept Videos All Chemistry Practice Problems Mass Percent Practice Problems. Element Fluorine (F), Group 17, Atomic Number 9, p-block, Mass 18.998. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
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Isotope | Atomic mass (Da) | Isotopic abundance (amount fraction) |
---|---|---|
19F | 18.998 403 163(6) | 1 |
Adobe acrobat dc crack for mac. Fluorine is a monoisotopic element and its atomic weight is determined solely by its isotope 19F. The Commission last revised the standard atomic weight of fluorine in 2013 based on the latest Atomic Mass Evaluation by IUPAP.
CIAAW
Fluorine
Ar(F) = 18.998 403 163(6) since 2013
The name derives from the Latin fluere for 'flow' or 'flux' because fluorite (CaF2) was used as a fluxin metallurgy owing to its low melting point. It was discovered in hydrofluoric acid by the Swedishpharmacist and chemist Carl-Wilhelm Scheele in 1771, but it was not isolated until 1886 by the Frenchpharmacist and chemist Henri Moissan.