The halogen source gases, often referred to as ozone-depleting substances (ODSs), include manufactured chemicals released to the atmosphere in a variety of applications, such as refrigeration, air conditioning, and foam blowing. Chlorofluorocarbons (CFCs) are an important example of chlorine-containing gases. Emitted source gases accumulate in the lower atmosphere (troposphere) and are transported to the stratosphere by natural air motions. The accumulation occurs because most source gases are highly unreactive in the lower atmosphere. Small amounts of these gases dissolve in ocean waters. The low reactivity of these manufactured halogenated gases is one property that makes them well suited for specialized applications such as refrigeration. Some halogen gases are emitted in substantial quantities from natural sources . These emissions also accumulate in the troposphere, are transported to the stratosphere, and participate in ozone destruction reactions. These naturally emitted gases are part of the natural balance of ozone production and destruction that predates the large release of manufactured halogenated gases. - http://www.theozonehole.com/ozonedestruction.htm



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Note added at 46 mins (2019-08-30 23:50:57 GMT)
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Nazwa fluorowce oznacza wszystkie pierwiastki z grupy 17. Cztery pierwsze to potocznie halogeny, czyli tytułowe "tworzące sole" (z gr. halos = sól, gennao = tworzę).

Oprócz tych nazw używane jest również pojęcie chlorowce (chlor, brom i jod). Powodem są własności fluoru, które nieco odbiegają od cech pozostałych członków grupy. - https://mlodytechnik.pl/eksperymenty-i-zadania-szkolne/chemi...

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Note added at 48 mins (2019-08-30 23:53:21 GMT)
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Fluorowce (inaczej halogeny) – pierwiastki chemiczne znajdujące się w grupie 17 (dawniej VIIA) układu okresowego - są to fluor , chlor , brom , jod , astat oraz zsyntezowany w drugiej połowie 2009 roku ununseptium . Nazwa halogeny pochodzi od greckich słów "sól" i "tworzyć" - https://www.szkolnictwo.pl/szukaj,Fluorowce

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Note added at 50 mins (2019-08-30 23:55:02 GMT)
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The halogens are located on the left of the noble gases on the periodic table. These five toxic, non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). - https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/...