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- This article discusses the group of chemical elements in the periodic table. For the light bulb, see the halogen lamp.
Group 17 Period 2 3 4 5 6 7 The halogens are a chemical series. They are the elements in Group 17 (old-style: VII or VIIA) of the periodic table: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and the as yet undiscovered ununseptium (Uus). The term halogen was coined to mean elements which produce salt in union with a metal. It comes from 18th century scientific French nomenclature based on erring adaptations of Greek roots.
These elements are diatomic molecules in their natural form. They require one more electron to fill their outer electron shells, and so have a tendency to form a singly-charged negative ion. This negative ion is referred to as a halide ion; salts containing these ions are known as halides.
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@hubristic this is suppose to be group7 of PERIODIC table O_o??a.k.a HALOGENS na ??
HANXOOO (M ALI HANZALA ABBASS) Thu, 17 Dec 2009 14:04:13 -0000
@hubristic this is suppose to be group7 of PERIODIC table O_o??a.k.a HALOGENS na ??
Group 7a elements such as flourine have seven valence electrons and are halogens
KingRexTX (Rex Royal) Wed, 16 Dec 2009 13:49:49 -0000
Group 7a elements such as flourine have seven valence electrons and are halogens
@ninthspace These are 240v Halogens sadly :/
xanthein (Jon) Wed, 16 Dec 2009 10:35:14 -0000
@ninthspace These are 240v Halogens sadly :/
@britneysbitch7 Colin jr is sitting next 2 me eatng a banana,he looks super cute.My polymer monomer alkanes+halogens rant's scaring him :-D
falloutgirl118 (Fall Out Girl) Mon, 14 Dec 2009 22:15:20 -0000
@britneysbitch7 Colin jr is sitting next 2 me eatng a banana,he looks super cute.My polymer monomer alkanes+halogens rant's scaring him :-D
gonna start studying halogens, S block physical & chemical properties + extraction
Maryyyam (Maryam Almalki) Mon, 14 Dec 2009 19:36:51 -0000
gonna start studying halogens, S block physical & chemical properties + extraction <///3
In science going to do a presentation w. Brenna and mitch on halogens! H-a-l-o-g-e-n halogens are our friends
hellojohnna (Johnna Macaruso) Mon, 14 Dec 2009 14:48:37 -0000
In science going to do a presentation w. Brenna and mitch on halogens! H-a-l-o-g-e-n halogens are our friends
Doc Brown's Chemistry Clinic: The Halogens - Includes an overview, general properties, reactivity trends, and information about the industrial electrolysis of sodium chloride solution.
Meta Description: [ GCSE Group 7 THE HALOGENS revision notes at Doc Brown's Chemistry Clinic.summary notes diagram diagrams revise reviseit revision multiple choice questions question quiz quizzes worksheet worksheets Properties of elements, displacement reactions, reactivity, electrolysis of brine, uses of product... ]
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The Chemistry of the Halogens - Covers their properties, methods of preparation, general trends, the hydrogen halides, and oxyacids of the halogens and their salts.
Visual Elements: The Halogens - Overview, general properties, and chemical data for the group.
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