Halogen

Halogen

The halogens or halogen elements are a series of nonmetal elements from group 17 of the periodic table (formerly: VII, VIIA), comprising fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117 (ununseptium) may also be a halogen.

The group of halogens is the only periodic table group which contains elements in all three familiar states of matter at standard temperature and pressure.

Read more about Halogen:  History and Etymology, Group Trends, Diatomic Halogen Molecules, Production, Biological Role, Toxicity

Other articles related to "halogen, halogens":

Space Heater - Types of Heating - Radiative Heaters
... Halogen heaters usually comprise tungsten filaments in heat-resistant quartz envelopes, mounted in front of a metal reflector in a plastic case ... They operate much like halogen light-bulbs, but radiate their energy primarily in the infrared spectrum ... The advantage of halogen heaters is that the radiation they produce is absorbed directly by clothing and skin, without first heating the air in the space ...
Halogen - Toxicity
... Halogens are very reactive elements and their toxicity derives from their strong oxidant properties ... Iodine is the least dangerous of the halogens and will rarely kill a person if its vapor is inhaled however ingestion can be fatal even at a low dose (28 mg/kg) ...
Tropospheric Ozone Depletion Events
... Br-) into reactive halogen species (e.g ... how salts are transported from the ocean and oxidized to become reactive halogen species in the air ... Other halogens (chlorine and iodine) are also activated through mechanisms coupled to bromine chemistry ...
Halogen Bond
... Halogen bonding (XB) is the non-covalent interaction that occurs between a halogen atom (Lewis acid) and a Lewis base ... Although halogens are involved in other types of bonding (e.g ... covalent), halogen bonding specifically refers to when the halogen acts as an electrophilic species ...
Halohydrin Formation Reaction
... reaction is a chemical reaction in which a halogen is added to an alkene in aqueous solution to form a halohydrin ... The reaction is a form of electrophilic addition it is similar to the halogen addition reaction ... is as follows C=C + X2 + H2O → X-C-C-OH (X represents a halogen, either Cl or Br) ...