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The halogens (/ ˈ h æ l ə dʒ ə n, ˈ h eɪ-,-l oʊ-,-ˌ dʒ ɛ n / [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 is theoretically expected to ...
There are currently 118 known chemical elements with a wide range of physical and chemical properties. Amongst this diversity, scientists have found it useful to apply names for various sets of elements that have similar properties, to varying degrees.
Halogen lamp (105 W) for replacement purposes with an E27 screw base A close-up of a halogen lamp capsule. A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a ...
Chalcogens also form compounds with halogens known as chalcohalides, or chalcogen halides. The majority of simple chalcogen halides are well-known and widely used as chemical reagents . However, more complicated chalcogen halides, such as sulfenyl, sulfonyl, and sulfuryl halides, are less well known to science.
Carbon forms tetrahalides with all the halogens. Carbon also forms many oxides such as carbon monoxide, carbon suboxide, and carbon dioxide. Carbon forms a disulfide an a diselenide. [4] Silicon forms several hydrides; two of them are SiH 4 and Si 2 H 6. Silicon forms tetrahalides with fluorine (SiF 4), chlorine (SiCl 4), bromine (SiBr 4), and ...
Halogen-containing natural products (5 C, 46 P) T. Tennessine (1 C, 2 P) Pages in category "Halogens" The following 12 pages are in this category, out of 12 total.
Groups may also be identified using their topmost element, or have a specific name. For example, group 16 is also described as the "oxygen group" and as the " chalcogens ". An exception is the " iron group ", which usually refers to group 8 , but in chemistry may also mean iron , cobalt , and nickel , or some other set of elements with similar ...
This article mainly deals with halogenation using elemental halogens (F 2, Cl 2, Br 2, I 2). Halides are also commonly introduced using salts of the halides and halogen acids. [clarification needed] Many specialized reagents exist for and introducing halogens into diverse substrates, e.g. thionyl chloride.