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halogens    
n. 卤素

卤素

Chlorine \Chlo"rine\, n. [Gr. ? pale green, greenish yellow. So
named from its color. See {Yellow}.] (Chem.)
One of the elementary substances, commonly isolated as a
greenish yellow gas, two and one half times as heavy as air,
of an intensely disagreeable suffocating odor, and
exceedingly poisonous. It is abundant in nature, the most
important compound being common salt (Sodium chloride). It is
powerful oxidizing, bleaching, and disinfecting agent. Symbol
Cl. Atomic weight, 35.4.
[1913 Webster]

{Chlorine family}, the elements fluorine, chlorine, bromine,
and iodine, called the {halogens}, and classed together
from their common peculiarities.
[1913 Webster]


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  • Halogen - Wikipedia
    The halogens ( ˈhælədʒən, ˈheɪ -, - loʊ -, - ˌdʒɛn [1][2][3]) are a group in the periodic table consisting of six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and the radioactive elements astatine (At) and tennessine (Ts), though some authors [4] would exclude tennessine as its chemistry is unknown and i
  • Halogen | Elements, Examples, Properties, Uses, Facts . . .
    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
  • Halogen Elements – List and Facts - Science Notes and Projects
    The halogens are a periodic table group of elements They are found on the righthand side of the periodic table, just to the left of the noble gas group The halogens are group VII or 7 in older nomenclature and group 17 in modern IUPAC nomenclature
  • List of Halogens (Element Groups) - ThoughtCo
    The halogens are highly reactive nonmetallic elements They commonly form ionic bonds with metals and covalent bonds with other nonmetals The halogens are the only group of elements that include elements in all of the three main states of matter: gases, liquids, and solids
  • Physical properties of the halogens - Group 7 - the halogens . . .
    Learn about and revise the halogens in group 7 of the periodic table with this BBC Bitesize GCSE Combined Science (Edexcel) study guide
  • 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 Properties - BYJUS
    We will look at some of the physical and chemical properties of Halogens Physical Properties The group of halogens is the only periodic table group that contains elements in all three familiar states of matter at standard temperature and pressure; Fluorine (F) is a pale yellow gas; Chlorine (Cl) is a greenish gas; Bromine (Br) is a dark red
  • Halogens - Chemistry Encyclopedia - uses, elements, gas . . .
    The halogens are the family of chemical elements that includes fluorine (atomic symbol F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At) The halogens make up Group VIIA of the Periodic Table of the elements
  • Halogens - Periodic Table - ChemTalk
    The halogens, aka halogen family, are a group of reactive elements in group 17 of the periodic table, to the right of the chalcogens, and to the left of the noble gases Fluorine and chlorine are the “poster children” of the halogens
  • Halogens - Chemistry Learner
    Halogens are special category of highly reactive, non-metal elements which fall in group VIIa of the periodic table Because of their high reactivity, the halogen family do not exist in nature in their native form, i e in monoatomic form





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