Difference between revisions of "Halogen"
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| − | A '''halogen''' is an [[chemical element|element]] from '''group 17''' of the [[periodic table]], that is, one of [[fluorine]], [[chlorine]], [[bromine]], [[iodine]] or [[astatine]].<ref>{{RedBook2005|pages=51–52}}.</ref> The name is derived from the Ancient Greek {{Polytonic|ἅλς}} (''hals'', genitive {{Polytonic|ἁλός}} ''halos'', "salt") and -{{Polytonic|γενής}} (''genēs'', "producer of"), and was first used in 1811 by the German chemist [[J. S. C. Schweigger]].<ref>{{Greenwood&Earnshaw1st|pages=920–21}}.</ref> | + | A '''halogen''' is an [[chemical element|element]] from '''group 17''' of the [[periodic table]], that is, one of [[fluorine]], [[chlorine]], [[bromine]], [[iodine]] or [[astatine]].<ref>{{RedBook2005|pages=51–52}}.</ref> The name is derived from the Ancient Greek {{Polytonic|ἅλς}} (''hals'', genitive {{Polytonic|ἁλός}} ''halos'', "salt") and -{{Polytonic|γενής}} (''genēs'', "producer of"), and was first used in 1811 by the German chemist [[J. S. C. Schweigger]] to refer to chlorine, the only element that was known at that time to react directly with metals to produce [[salt]]s.<ref>{{Greenwood&Earnshaw1st|pages=920–21}}.</ref> |
==References== | ==References== | ||
Revision as of 07:13, 25 December 2010
A halogen is an element from group 17 of the periodic table, that is, one of fluorine, chlorine, bromine, iodine or astatine.[1] The name is derived from the Ancient Greek ἅλς (hals, genitive ἁλός halos, "salt") and -γενής (genēs, "producer of"), and was first used in 1811 by the German chemist J. S. C. Schweigger to refer to chlorine, the only element that was known at that time to react directly with metals to produce salts.[2]
References
- ↑ Nomenclature of Inorganic Chemistry; IUPAC Recommendations 2005; Royal Society of Chemistry: Cambridge, 2005; pp 51–52. ISBN 0-85404-438-8, <http://www.iupac.org/publications/books/rbook/Red_Book_2005.pdf>.
- ↑ Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; pp 920–21. ISBN 0-08-022057-6.
External links
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See also the corresponding article on Wikipedia. |
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