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]

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halo·gen 'hal-ə-jən n any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VII A of the periodic table and exist in the free state normally as diatomic molecules
ha·log·e·nous ha-'läj-ə-nəs adj

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hal·o·gen (halґə-jən) (haґlə-jən) [halo- + -gen] an element of a closely related chemical family, all of which form similar (saltlike) compounds in combination with sodium and most other metals. The halogens are bromine, chlorine, fluorine, iodine, and astatine.

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  • halogen — HALOGÉN, Ă, halogeni, e, s.m., adj. 1. s.m. Nume generic pentru elementele fluor, clor, brom, iod şi astatiniu, care se pot combina direct cu metalele, dând săruri. 2. adj. Care dă naştere la săruri. – Din fr. halogène. Trimis de gall, 13.09.2007 …   Dicționar Român

  • halogen — ► NOUN 1) Chemistry any of the group of reactive, non metallic elements fluorine, chlorine, bromine, iodine, and astatine. 2) (before another noun ) using a filament surrounded by halogen vapour: a halogen bulb. ORIGIN from Greek hals salt …   English terms dictionary

  • Halogen — Hal o*gen (h[a^]l [ o]*j[e^]n), n. [Gr. a ls, alo s, salt + gen: cf. F. halog[ e]ne.] (Chem.) An electro negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, fluorine, bromine, and iodine;… …   The Collaborative International Dictionary of English

  • halogen — (n.) general name for elements of the chlorine family, 1842, from Swedish, coined by Swedish chemist Baron Jöns Jakob Berzelius (1779 1848), lit. salt producer, from Gk. hals salt (see HALO (Cf. halo )) + gen giving birth to (see GEN (Cf. gen));… …   Etymology dictionary

  • Halogen — ↑ Salz …   Das Herkunftswörterbuch

  • halogen — {{/stl 13}}{{stl 8}}rz. mnż I, D. u, Mc. halogennie, zwykle w lm {{/stl 8}}{{stl 20}} {{/stl 20}}{{stl 12}}1. {{/stl 12}}{{stl 7}} pierwiastek chemiczny, jeden z grupy bardzo aktywnych chemicznie niemetali (należą do nich: fluor, chlor, brom, jod …   Langenscheidt Polski wyjaśnień

  • halogen — [hal′ə jən] n. [ HALO + GEN] any of the five very reactive, nonmetallic chemical elements making up group VIIA of the periodic table: fluorine is the smallest and most reactive of the group, and astatine is the largest and least reactive: see the …   English World dictionary

  • 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 —     …   Deutsch Wikipedia

  • halogen — I UK [ˈhælədʒen] / US [ˈhælədʒən] noun [countable] Word forms halogen : singular halogen plural halogens chemistry a chemical element belonging to a group of five that combine with metals to form salts II UK [ˈhælədʒen] / US [ˈhælədʒən] adjective …   English dictionary

  • 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

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