HALOGENS



Table salt, bleach, fluoride in toothpaste, chlorine in swimming pools—what do all of these have in common? Add halogen lamps to the list, and the answer becomes more clear: all involve one or more of the halogens, which form Group 7 of the periodic table of elements. Known collectively by a term derived from a Greek word meaning "salt-producing," the halogen family consists of five elements: fluorine, chlorine, bromine, iodine, and astatine. The first four of these are widely used, often in combination; the last, on the other hand, is a highly radioactive and extremely rare substance. The applications of halogens are many and varied, including some that are dangerous, controversial, and deadly.

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User Contributions:

1
dennis
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Dec 15, 2009 @ 7:07 am
Thanks this info helped alot but i need to know what substance is in all those items ok ty
2
Usman
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Sep 9, 2017 @ 4:04 am
helped alot but i need to know all elements in group 7 and their uses which are halogens

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