What is Fluorine?
{{Infobox fluorine}} [[File:F,9.jpg|thumb|A more real picture of fluorine]] '''Fluorine''' (symbol '''F''') is a [[chemical element]] that is very poisonous. Its [[atomic number]] (which is the number of [[proton]]s in it) is 9, and its [[atomic mass]] is 19. It is part of the Group 7 ([[halogen]]s) on the [[periodic table]] of elements. ==Properties== Fluorine is a light yellow diatomic gas. It is very reactive gas, which exists as diatomic molecules. It is the most reactive element. Fluorine has a very high attraction for electrons because it is missing one. This makes it the most powerful [[oxidizing agent]]. It can rip electrons from water (making [[oxygen]]) and ignite [[propane]] on contact. It does not need a spark. Metals can catch on fire when placed in a stream of fluorine. After it is [[reduction (chemistry)|reduced]] by reacting with other things, it forms the stable [[fluoride]] ion. Fluorine is very poisonous. Fluorine bonds very strongly with [[carbon]]. It can react with the unreactive [[noble gas]]es. It explodes when mixed with [[hydrogen]]. The melting point of fluorine is -363.33°F (-219.62°C), the boiling point is -306.62°F (-188.12°C). ===Chemical compounds=== [[Chemical compound]]s containing fluorine [[ion]]s are called [[fluoride]]s. Fluorine only exists in one [[oxidation state]]: -1. *[[Aluminium fluoride]] *[[Antimony trifluoride]] *[[Antimony pentafluoride]] *[[Arsenic trifluoride]] *[[Arsenic pentafluoride]] *[[Bismuth(III) fluoride]] *[[Bismuth(V) fluoride]] *[[Bromine trifluoride]] *[[Bromine pentafluoride]] *[[Chlorine monofluoride]] *[[Chlorine trifluoride]] *[[Cobalt(II) fluoride]] *[[Cobalt(III) fluoride]] *[[Disulfur decafluoride]] *[[Hydrofluoric acid]], a solution of hydrogen fluoride in water *[[Hydrogen fluoride]] *[[Iodine trifluoride]] *[[Iodine pentafluoride]] *[[Iodine heptafluoride]] *[[Manganese(II) fluoride]] *[[Manganese(III) fluoride]] *[[Manganese(IV) fluoride]] *[[Potassium fluoride]] *[[Selenium tetrafluoride]] *[[Selenium hexafluoride]] *[[Silver(I) fluoride