Look up: halogen

1. 
   Halogen
   One of the elements in the next-to-last column of the periodic table - fluorine, chlorine, bromine, iodine, and astatine.
   Found on http://www.kcpc.usyd.edu.au/discovery/gl
   
   
2. 
   Halogen
   Halogen is a particular group of elements with similar bonding properties.
   Found on http://www.encyclo.co.uk/nol.php
   
   
3. 
   Halogen
   A type of incandescent lamp with higher energy-efficiency that standard ones.
   Found on http://www.epa.gov/OCEPAterms/
   
   
4. 
   halogen
   [n] - any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
   Found on http://www.webdictionary.co.uk/definitio
   
   
5. 
   Halogen
   Halogen is a particular group of elements with similar bonding properties, consisting of flourine, chlorine, bromine and iodine.HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKrRbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXeCsBaLaHfTaWReOsIrPtAuHgTlPbBiPoAtRnFrRaAcLanthanidesCePrNdPmSmEuGdTbDyHoErTmYbLuActinidesThPaUNpPuAmCmBkCfEsFmMdNoLr See also:...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
6. 
   halogen
   group VIIA; group 18. An element of group VIIA (a. k. a. Group 18). The name means 'salt former'; halogens react with metals to form binary ionic compounds. Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At) are known at this time.
   Found on http://antoine.frostburg.edu/chem/senese
   
   
7. 
   Halogen
   The group VIIa elements in the periodic table.
   Found on http://www.chemicalglossary.net/definiti
   
   
8. 
   Halogen
   Swimming pool chemistry: A member of the family of elements fluorine, bromine, chlorine and iodine.
   Found on http://www.1st-direct.com/acatalog/Chemi
   
   
9. 
   halogen
   Any of the elements of the halogen family, consisting of fluorine, chlorine, bromine, iodine, and astatine.
   Found on http://www.bacgroup.com/glossary/glossar
   
   
10. 
    halogen
    Highly reactive gases forming group 7 of the periodic table
    Found on http://www.fisicx.com/quickreference/sci
    
    
11. 
    Halogen
    Hal'o·gen (hăl'o*jĕn) noun [ Greek 'a`ls , 'alo`s , salt + -gen : confer French halogène .] (Chemistry) An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family , under Chlorine .
    Found on http://www.encyclo.co.uk/webster/H/8
    
    
12. 
    halogen
    <chemistry> An electronegative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine. ... Origin: Gr. 'als, 'alos, salt + -gen: cf. F. Halogene. ... Source: Websters Dictionary ... (01 Mar 1998) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
13. 
    Halogen
    The `halogens` or `halogen elements` are a series of nonmetal elements from Group 17 (old-style: VII or VIIA; Group 7 IUPAC Style) of the periodic table, comprising fluorine, F; chlorine, Cl; bromine, Br; iodine, I; and astatine, At. The undiscovered element 117, temporarily named ununseptium, may also be considered a halogen. The group of halogens is the only group which contains elements in all three familiar states of matter at standard temp...
    Found on http://en.wikipedia.org/wiki/Halogen
    
    
14. 
    halogen
    (hal´ә-jәn) (ha´lә-jәn) an element of group VII of the periodic table, the members of which form similar (saltlike) compounds in combination with sodium. The halogens are bromine, chlorine, fluorine, iodine, and astatine.
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
15. 
    Halogen
    • (n.) An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine.
    Found on http://thinkexist.com/dictionary/meaning
    
    
16. 
    halogen
    halogen 1. Any of the five electronegative diatomic elements, fluorine, chlorine, iodine, bromine, or astatine; used to describe lamps or other light sources containing a filament heated by a halogen. So called because the elements readily form salts when combined with metals. 2. An element of a closely related chemical family, all of which form similar ...
    Found on http://www.wordinfo.info/words/index/inf
    
    
17. 
    halogen
    One of the chlorine group (fluorine, chlorine, bromine, iodine, astatine) of elements; halogens form monobasic acids with hydrogen, and their hydroxides (fluorine forms none) are also monobasic acids. [G. hals, salt, + -gen, producing]
    Found on
    
    
18. 
    Halogen
    This is the gas contained in the lamp of a Quartz Light, which prolongs the life of the tungsten filament. Quartz Lights are sometimes called Halogen Lights for this reason.
    Found on What to say when you are done shooting,
    
    
19. 
    halogen
    Any of the elements of the halogen family, consisting of fluorine, chlorine, bromine, iodine, and astatine
    Found on http://www.corrosionsource.com/handbook/
    
    
20. 
    Halogen
    Elements that attack carbon. Fluorine, bromine, chlorine, astatine and iodine.
    Found on http://www.mcnallyinstitute.com/Charts/G
    
    
21. 
    halogen
    Any of a group of chemically related, nonmetallic elements that fall in group VII of the periodic table. The halogens are: • fluorine • chlorine • bromine • iodine • astatine The halogens are highly electronegative and react strongly with other elements and with organic co...
    Found on http://www.daviddarling.info/encyclopedi
    
    
22. 
    halogen
    halogen (hăl'ujen) [Gr.,=salt-bearing], any of the chemically active elements found in Group 17 of the periodic table; the name applies especially to fluorine (symbol F), chlorine (Cl), bromine (Br), and iodine (I). Astatine (At), formerly known as alabamine, is a radioactive element also ...
    Found on http://www.infoplease.com/ce6/sci/A08224