a chemical element. Fluorine is a poisonous pale yellow gas and is very reactive. Word Origin Want to learn more? Find out which words work together and produce more natural-sounding English with the Oxford Collocations Dictionary app. Try it for free as part of the Oxford Advanced Learner...
The Red Green and Blue company in England sells a very nice element collection in several versions.Max Whitby, the director of the company, very kindly donated a complete set to the periodic table table. Almost all the samples in the set are very, very nice, but this one I have to teas...
Fluorine is the chemical element with atomic number 9, represented by the symbol F. Fluorine forms a single bond with itself in elemental form, resulting in the diatomic F2 molecule. F2 is a supremely reactive, poisonous, pale, yellowish brown gas. Elemental fluorine is the most chemically reac...
Cover Picture: Occurrence of Difluorine F2 in Nature—In?Situ Proof and Quantification by NMR Spectroscopy (Angew. Chem. Int. Ed. 31/2012)antozonitefluorinefluoriteNMR spectroscopyThe Most Reactive Element fluorine, was long thought not to occur in nature as F2. In their Communication on page...
Cover Picture: Occurrence of Difluorine F2 in Nature—InSitu Proof and Quantification by NMR Spectroscopy (Angew. Chem. Int. Ed. 31/2012)antozonitefluorinefluoriteNMR spectroscopyThe Most Reactive Element fluorine, was long thought not to occur in nature as F2. In their Communication on page...
Origin of Name From the Latin and French words for “flow,” fluere. Occurrence Fluorine is the 13th most abundant element on the Earth. It makes up about 0.06% of theEarth’s crust. Fluorine is widely distributed in many types of rocks and minerals, but neverfound in its pure form. Fl...
The massive air will enter in the oil to make “the cavitation” the phenomenon to intensify, the hydraulic fluid compressibility will increase, works not stably, will reduce the working efficiency, the functional element appears the work “crawling” and so on the adverse consequences.Moreover, ...
The cover picture shows, with a wordplay of the famous phrase To be or not to be ? from William Shakespeare's play Hamlet, the ambivalent nature of fluorine the most electronegative element and known to form some of the strongest hydrogen bonds, as in [FH···F]. Notwithstanding this, ...
the determination of the tear strength of the release agent by peel test; the determination of the element composition (XPS) and surface characteristics (SEM) before and after atmospheric pressure plasma pre-treatment, characterization the topology and the characterization of the adhesive strength by ...
Origin of NameFrom the Latin and French words for “flow,” fluere. OccurrenceFluorine is the 13th most abundant element on the Earth. It makes up about 0.06% of theEarth’s crust. Fluorine is widely distributed in many types of rocks and minerals, but neverfound in its pure form. Fluori...