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  • 14-07-2017
  • Chemistry
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what is halogens?why are they called very active non metals?

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Аноним Аноним
  • 15-08-2017
Any of the elements occupying group 17 on the periodic table. They form highly acidic compounds with hydrogen.


The elements are:
Fluorine (F)
Chlorine (Cl)
Bromine (Br)
Iodine (I)
Astatine (At)
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