What is Halogen gas?

Halogens (Latin for salt) are elements of group VII A (group of elements 7) in the periodic table of chemical elements This group includes the chemical elements fluorine, chlorine, bromine, iodine, astatine and tennessine.

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Halogen is a chemical element belonging to group VII A .

Physical properties

In the Halogen group, physical properties change with the following rules: Aggregation state, color, melting temperature, boiling point…

Fluorine reacts violently with water to release oxygen. Other halogens are relatively sparingly soluble in water and highly soluble in some organic solvents. The halogen group includes: F, Cl, Br, I and At is a radioactive element

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Chemical properties

Because the outermost electron shell has a similar configuration, the halogens have many similarities in the chemical properties of the element as well as in the composition and properties of the compounds.

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Halogens have great electron affinity. The halogen atom X with 7 electrons in the outer shell easily gains 1 more electron to form the negative ion X- which has the electron configuration of the adjacent noble gas in the periodic table

Halogen gas is the raw material for making halogen bulbs

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Halogens have high electronegativity. The electronegativity of Fluorine (3.98) is the largest of all chemical elements. From fluorine to chlorine bromine and iodine… the atomic radius increases and the electronegativity decreases.

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Halogens are typical nonmetals, they are strong oxidizing agents. The oxidizing capacity of the halogens decreases from fluorine to iodine. In compounds, fluorine always has oxidation number -1, other halogens besides oxidation number -1 also have oxidation numbers +1, +3, +5, +7.