Editing Halogen (section)

== Production ==
[[Image:Halogens.jpg|thumb|upright=1.5|right|From left to right: [[chlorine]], [[bromine]], and [[iodine]] at room temperature. Chlorine is a gas, bromine is a liquid, and iodine is a solid. [[Fluorine]] could not be included in the image due to its high [[reactivity (chemistry)|reactivity]], and astatine and tennessine due to their radioactivity.]]
Approximately six million metric tons of the fluorine mineral [[fluorite]] are produced each year. Four hundred-thousand metric tons of hydrofluoric acid are made each year. Fluorine gas is made from hydrofluoric acid produced as a by-product in [[phosphoric acid]] manufacture. Approximately 15,000 metric tons of fluorine gas are made per year.<ref name = "Nature's Building Blocks"/>

The mineral [[halite]] is the mineral that is most commonly mined for chlorine, but the minerals [[carnallite]] and [[sylvite]] are also mined for chlorine. Forty million metric tons of chlorine are produced each year by the [[electrolysis]] of [[brine]].<ref name = "Nature's Building Blocks"/>

Approximately 450,000 metric tons of bromine are produced each year. Fifty percent of all bromine produced is produced in the [[United States]], 35% in [[Israel]], and most of the remainder in [[China]]. Historically, bromine was produced by adding [[sulfuric acid]] and bleaching powder to natural brine. However, in modern times, bromine is produced by electrolysis, a method invented by [[Herbert Dow]]. It is also possible to produce bromine by passing chlorine through seawater and then passing air through the seawater.<ref name = "Nature's Building Blocks"/>

In 2003, 22,000 metric tons of iodine were produced. Chile produces 40% of all iodine produced, [[Japan]] produces 30%, and smaller amounts are produced in [[Russia]] and the United States. Until the 1950s, iodine was extracted from [[kelp]]. However, in modern times, iodine is produced in other ways. One way that iodine is produced is by mixing [[sulfur dioxide]] with [[nitrate]] ores, which contain some [[iodate]]s. Iodine is also extracted from [[natural gas]] fields.<ref name = "Nature's Building Blocks"/>

Even though astatine is naturally occurring, it is usually produced by bombarding bismuth with alpha particles.<ref name = "Nature's Building Blocks"/>

Tennessine is made by using a cyclotron, fusing berkelium-249 and calcium-48 to make tennessine-293 and tennessine-294.