Look up: fluorine

1. 
   Fluorine
   Fluorine is a gaseous element with the symbol F belonging to the group known as halogens. It is the most chemically reactive element (many substances ignite spontaneously in it), and for this reason it is never found uncombined.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   Fluorine
   Fluorine is a non-metallic element occurring naturally.
   Found on http://www.encyclo.co.uk/nol.php
   
   
3. 
   fluorine
   [n] - a nonmetallic univalent element belonging to the halogens
   Found on http://www.webdictionary.co.uk/definitio
   
   
4. 
   Fluorine
   Fluorine is a pale greenish yellow gas that is the first in the halogen group. Symbol F
   Found on http://www.diracdelta.co.uk/science/sour
   
   
5. 
   fluorine
   chemical element:atomic number 9 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
6. 
   Fluorine
   Flu'or·ine (flū'ŏr*ĭn or -ēn; 104) noun [ New Latin fluorina : confer German fluorin , French fluorine . So called from its occurrence in the mineral fluorite .] (Chemistry) A non-metallic, gaseous element, strongly acid or negative, and associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. I ...
   Found on http://www.encyclo.co.uk/webster/F/49
   
   
7. 
   fluorine
   <chemistry, element> 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 ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
8. 
   Fluorine
   `Fluorine` (, meaning `to flow`), is the chemical element with the symbol `F` and atomic number 9. Atomic fluorine is univalent and is the most chemically reactive and electronegative of all the elements. In its elementally isolated (pure) form, fluorine is a poisonous, pale, yellowish brown gas, with chemical formula F2. Like other halogens, molecular fluorine is highly dangerous; it causes severe chemical burns on contact with skin. Fluorine...
   Found on http://en.wikipedia.org/wiki/Fluorine
   
   
9. 
   fluorine
   (F) (floor´ēn) a chemical element, atomic number 9, atomic weight 18.998. fluorine 18 a radioactive isotope of fluorine, atomic mass 18, having a half-life of 1.8925 hours; it has been used as a tracer in positron emission tomography.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
10. 
    Fluorine
    • (n.) 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 gla...
    Found on http://thinkexist.com/dictionary/meaning
    
    
11. 
    fluorine
    most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table.[15 related articles]
    Found on http://www.britannica.com/eb/a-z/f/40
    
    
12. 
    fluorine
    A gaseous chemical element, atomic no. 9, atomic wt. 18.9984032; 18F (half-life of 1.83 h) is used as a diagnostic aid in various tissue scans. [L. fluere, flow]
    Found on
    
    
13. 
    fluorine
    (F) A pale yellow, highly corrosive, highly poisonous, gaseous element. It occurs naturally as fluorite, cryolite, and fluorapatite (see apatite). Fluorine is the lightest halogen and the most electronegative, oxidizing, and reactive of all the elements. Steel wool bursts i...
    Found on http://www.daviddarling.info/encyclopedi
    
    
14. 
    fluorine
    fluorine (flOO'urēn, –rin) , gaseous chemical element; symbol F; at. no. 9; at. wt. 18.998403; m.p. -219.6°C; b.p. -188.14°C; density 1.696 grams per liter at STP; valence -1. Fluorine is a yellowish, poisonous, highly corrosive gas. It is the most chemically active nonmetall...
    Found on http://www.infoplease.com/ce6/sci/A08190