Halogen | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-25

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Halogen


00:01:13 1 History
00:04:18 1.1 Etymology
00:05:34 2 Characteristics
00:05:44 2.1 Chemical
00:07:31 2.1.1 Molecules
00:07:39 2.1.1.1 Diatomic halogen molecules
00:08:14 2.1.2 Compounds
00:08:22 2.1.2.1 Hydrogen halides
00:10:23 2.1.2.2 Metal halides
00:11:56 2.1.2.3 Interhalogen compounds
00:13:11 2.1.2.4 Organohalogen compounds
00:14:01 2.1.2.5 Polyhalogenated compounds
00:14:30 2.1.3 Reactions
00:14:38 2.1.3.1 Reactions with water
00:16:04 2.2 Physical and atomic
00:16:27 2.2.1 Isotopes
00:18:28 3 Production
00:20:21 4 Applications
00:22:44 5 Biological role
00:25:23 6 Toxicity
00:27:44 7 Superhalogen
00:29:12 8 See also



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SUMMARY
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The halogens () are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117 (tennessine, Ts) may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17. The symbol X is often used generically to refer to any halogen.
The name "halogen" means "salt-producing". When halogens react with metals they produce a wide range of salts, including calcium fluoride, sodium chloride (common table salt), silver bromide and potassium iodide.
The group of halogens is the only periodic table group that contains elements in three of the main states of matter at standard temperature and pressure. All of the halogens form acids when bonded to hydrogen. Most halogens are typically produced from minerals or salts. The middle halogens, that is chlorine, bromine and iodine, are often used as disinfectants. Organobromides are the most important class of flame retardants. Elemental halogens are dangerous and can be lethally toxic.