halogen compounds

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• Compounds of carbon — Scientists once thought that organic compounds are or could only be created by living organisms. Over time, human have learned how to synthesize organic compounds. There is an immense number of distinct compounds that contain carbon atoms. Some… …   Wikipedia

• halogen element — ▪ chemical element group Introduction  any of the five nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic (periodic law) table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine… …   Universalium

• Halogen — The halogens or halogen elements are a series of nonmetal elements from Group 17 IUPAC Style (formerly: VII, VIIA, or Group 7) of the periodic table, comprising fluorine, F; chlorine, Cl; bromine, Br; iodine, I; and astatine, At. The undiscovered …   Wikipedia

• Halogen lamp — A halogen lamp is an incandescent lamp in which a tungsten filament is sealed into a compact transparent envelope filled with an inert gas, plus a small amount of halogen such as iodine or bromine. The halogen cycle increases the lifetime of the… …   Wikipedia

• Halogen dance rearrangement — The halogen dance rearrangement is an organic reaction in which a halogen substituent moves to a new position on an aromatic ring system. The reaction belongs to a class of organic reactions called 1,2 rearrangements. The original halogen dance… …   Wikipedia

• halogen — hal|o|gen [ˈhælədʒən] n [U] [Date: 1800 1900; : Swedish; Origin: Greek hals salt ] 1.) a halogen light uses halogen gas to produce light halogen bulb/lamp/light etc 2.) one of a group of five simple chemical substances that make ↑compounds easily …   Dictionary of contemporary English

• halogen — halogenous /ha loj euh neuhs/, adj. /hal euh jeuhn, jen , hay leuh /, n. Chem. any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals. [1835 45; HALO + GEN] * * * …   Universalium

• 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 …   Medical dictionary

• halogen — noun (U) one of a group of five simple chemical substances that make compounds easily …   Longman dictionary of contemporary English

• Organosulfur compounds — are organic compounds that contain sulfur. They are often associated with foul odours, but many of the sweetest compounds known are organosulfur derivatives. Nature abounds with organosulfur compounds sulfur is essential for life. Two of the 20… …   Wikipedia

• Low Smoke Zero Halogen — (LSZH or LSOH) is a type of cable jacketing used in the manufacture of industrial and network cabling. LSZH cable jacketing is composed of thermoplastic or thermoset compounds that emit limited smoke and no halogens when exposed to high sources… …   Wikipedia