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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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