Comparison of halogens

Comparison of halogens

Halogen elements are a group in the periodic table consisting of five chemically related elements, fluorine, chlorine, bromine, iodine, and astatine.

Chemistry

Keywords

halogen, Group 7, Group 17, homonuclear molecule, fluorine, bromine, chlorine, iodine, diatomic, molecule, oxidant, nonpolar, nonpolar molecule, toxic, polarisability, inorganic chemistry, chemistry

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Comparison of hydrogen halides

Atoms within hydrogen halides are bound by covalent bonds, forming polar molecules.

Bromine (Br₂)

One of the halogens, it may cause skin irritation.

Chlorine (Cl₂)

A yellow-green toxic gas with a strong odour, one of the halogens.

Fluorine (F₂)

The lightest halogen, a pale yellow-green, toxic gas, extremely reactive. Its best known compound is teflon.

Iodine (I₂)

A solid, grey substance which sublimates when heated. Its solution in alcohol is called tincture of iodine, it is a disinfectant.

1,1,2,2-tetrafluorethylene (C₂F₄)

Colourless, odourless gas, the monomer of teflon.

Beryllium dichloride (BeCl₂)

Used in the production of beryllium and as a catalyst.

Iodine crystal

A solid, grey substance which sublimates when heated. Its solution in alcohol is called ´tincture of iodine´, it is a disinfectant.

Addition

Addition is a reaction in which the molecules of two or more substances unite without the formation of a by-product.

Silver iodide (AgI)

A light yellow compound formed in the reaction of silver nitrate and potassium iodide.

Boron trifluoride (BF₃)

Colourless, heavier-than-air gas with a pungent odour. It forms white fumes in moist air.

Hypochlorite ion (OCl⁻)

Hypochlorite ions are formed when water is disinfected with chlorine.

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