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halogen    音标拼音: [h'ælədʒən]
n. 卤素

卤素

halogen
n 1: any of five related nonmetallic elements (fluorine or
chlorine or bromine or iodine or astatine) that are all
monovalent and readily form negative ions

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  • Halogen - Wikipedia
    Halogen lamps are a type of incandescent lamp using a tungsten filament in bulbs that have small amounts of a halogen, such as iodine or bromine added This enables the production of lamps that are much smaller than non-halogen incandescent lightbulbs at the same wattage
  • Halogen | Elements, Examples, Properties, Uses, Facts | Britannica
    Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts) Learn more about the properties of halogens in this article
  • List of Halogens (Element Groups) - ThoughtCo
    The halogens are the elements in group 17 of the periodic table This is the next-to-last column of elements on the righthand side of the table The halogen elements are fluorine, chlorine, bromine, iodine, astatine, and possibly tennessine The halogens are highly reactive nonmetallic elements
  • Halogen lamp - Wikipedia
    A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine
  • What are halogen elements? - Britannica
    The halogen elements are the six elements in Group 17 of the periodic table Group 17 occupies the second column from the right in the periodic table and contains fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts)
  • Shop Halogen Light Bulbs and Lamps | 1000Bulbs. com
    Halogen lamps are filled a halogen gas such as iodine or bromine This gas is heated up and bonds with the vaporizing tungsten molecules when a light bulb is turned on
  • Group 17: General Properties of Halogens - Chemistry LibreTexts
    The halogens are located on the left of the noble gases on the periodic table These five toxic, non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At)
  • HALOGEN Definition Meaning - Merriam-Webster
    The meaning of HALOGEN is any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VIIA of the periodic table and exist in the free state normally as diatomic molecules
  • 4. 6: Halogens and Halides - Chemistry LibreTexts
    The origin of halogen is the Greek word meaning the production of salt by direct reaction with a metal Since their reactivity is very high, halogens are found in nature only as compounds
  • Physical properties of the halogens - Group 7 - BBC
    The name 'halogen' means 'salt-producing' because halogens produce a range of salts when they react with metals





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