Question

what is a halogen?its uses?name some halogens?

Answer 1

A halogen are highly reactive elements located in group 17 of the periodic table.
 
Halogens are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

Uses of Halogens : Halogen lamp, Bromides as sedatives, Glass etching, Dry-cleaning (methylene chloride), Methyl bromide as an agricultural fumigant .

Answer 2

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any of five chemical substances that are not metals and that combine with hydrogen to form strong acid compounds from which simple salts can be made

(धातुओं से भिन्‍न) पाँच रसायनों में से कोई एक जिसके हाइड्रोजन के साथ मिलने से शक्तिशाली अम्‍ल बनते हैं जिनसे अकृत्रिम नमक बनाया जा सकता है; हैलोजन

The halogens are fluorine, chlorine, bromine, iodine and astatine.The halogens are fluorine, chlorine, bromine, iodine and astatine.

Halogens are used in the chemical, water and sanitation, plastics, pharmaceutical, pulp and paper, textile, military and oil industries. Bromine, chlorine, fluorine and iodine are chemical intermediates, bleaching agents and disinfectants