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halogens    
n. 鹵素

鹵素

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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  • Halogens - Symbols, Properties and Reactions - CK-12 Foundation
    The elements of Group VIIA (new Group 17 - fluorine, chlorine, bromine, iodine, and astatine) are called the halogens (yellow column) The term “halogen” means “salt-former” because these elements will readily react with alkali metal and alkaline earth metals to form halide salts The halogens all have the general electron configuration ns2np5, giving them seven valence electrons They
  • Halogens: The Versatile Elements Shaping Our World
    The halogens are a group of chemical elements in Group 17 of the periodic table, consisting of fluorine, chlorine, bromine, iodine, and astatine These highly reactive elements play a crucial role in various chemical processes, making them versatile and essential in shaping our world What are Halogens and Their Properties? Halogens are defined as a group of non-metal elements that exist in
  • Halogens | Resource | RSC Education
    The halogens, group 7, are an important group of elements both chemically and socially They are unusual in that they are coloured and diatomic They also have an order of reactivity that is the opposite of the metals in groups 1 and 2 In fact they are all very reactive,
  • 18. 11 Occurrence, Preparation, and Properties of Halogens - OpenStax
    Properties of the Halogens Fluorine is a pale yellow gas, chlorine is a greenish-yellow gas, bromine is a deep reddish-brown liquid, and iodine is a grayish-black crystalline solid Liquid bromine has a high vapor pressure, and the reddish vapor is readily visible in Figure 18 60 Iodine crystals have a noticeable vapor pressure When gently heated, these crystals sublime and form a beautiful
  • 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) Astatine and tennessine are radioactive elements with very short half-lives and thus do not occur naturally
  • The Halogens - HyperPhysics
    The Halogens - HyperPhysics The Halogens
  • Halogen Characteristics - Sciencing
    The halogens are chemical elements that constitute Group 17 of the periodic table The six non-metallic elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (As) and tennessine (Ts) The name "halogen" comes from a Greek word meaning "salt-producing," since fluorine, chlorine and iodine produce a sea salt-like substance when they form a compound with an alkaline metal
  • Halogen Properties - BYJUS
    Halogens are nonmetals At room temperature, fluorine and chlorine are gases, bromine is a liquid and Iodine and astatine are solids Halogens are very reactive, the reactivity decreases from fluorine to astatine Halogens do not exist in elemental form in nature Astatine isotopes are radioactive with short half-lives Table salt, bleach, fluoride in toothpaste, and chlorine in swimming pools
  • Group 17: The Halogens
    The Halogens in Group 17 are non metal elements that are diatomic and simple covalently bonded They decrease in reactivity down the group but increase in their melting and boiling points
  • Halogens - The Periodic Table
    Halogens included on the Periodic Table based on the IOUPAC 1985 standard Click on the ABC Elements Link for Information about each chemical element in the Periodic Table What are Halogens? Define Halogens Halogens is a term used in Periodic Chemistry when classifying the chemical elements Each element can usually be classified as a metal or a non-metal based on their general Physical and
  • Halogens | Definition, Group Number Uses - Study Latam
    The halogens are a fascinating group of elements found in Group 17 of the periodic table They are highly reactive, and their compounds have various applications in industries ranging from pharmaceuticals to cleaning products This article delves into the definition, group number, properties, and uses of halogens, as well as their significance in modern science and technology What are
  • 10. 1: The Group 17 Elements- The Halogens - Chemistry LibreTexts
    The Group 17 elements have a particular name: the halogens meaning born of salt This is due to the formation of salts when they form compounds with a metal Table 10 1 1 lists the derivation of the names of the halogens
  • Group 17: The 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) Although astatine is radioactive and only has short-lived isotopes, it behaves similar to iodine and is often included in the halogen group Because
  • 8. 13: The 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 and consist of: fluorine (F), chlorine (Cl), bromine (Br), …





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