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  Inorganic Chemistry

Halogen Family :

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Fluorine is the first member of group 17 or VIIA of the periodic table. It consists of five elements Fluorine (F), Chlorine (Cl), bromine (Br), iodine (I) and astatine (At). These are known as halogen because their salts are found in sea water. Halogen is a greek word meaning a sea salt.

Electronic configuration

Elements

Electronic configuration (ns2 np5)

9F

[He] 2s22sp5

17Cl

[Ne] 3s23p5

35Br

[Ar] 3d104s25p5

53l

[Kr] 4d105s25p5

85At

[Xe] 4f145d106s26p5

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