Question

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1).What are halogens.
2).Why is it not possible. to displace fluorine from metallic flouried by any other halogens

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Answer 1

1) the halogen group in a periodic table consisting of five chemical related elements falourine chlorine bromine iodine and astatine
the IUPAC namomecalture this know as 17th group
halogen means salt producing
when halogen react with metal they produce a wide range salt including calcium chloride and sodium chloride