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halogen |
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halogen /hal·o·gen/ (hal´o-jen) any of the nonmetallic elements of the seventh group of the periodic system: chlorine, iodine, bromine, fluorine, and astatine.
halogen [hal′ōjən] Etymology: Gk, hals, salt, genein, to produce any member of group 17 (or Group VIIA) in the periodic table: fluorine, chlorine, bromine, iodine, and astatine. With the exception of astatine, they are found in seawater as the corresponding halide ion. halogen (hal´ōjen), n an element of a closely related group of elements consisting of fluorine, chlorine, bromine, and iodine. halogen 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The Speedium halogen element, developed jointly with Philips, reportedly reduces heating time 10% to 15% relative to previous halogen heaters by emitting an additional wavelength that is absorbed by plastics. |
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