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  Halogen Family

Group 17 - The Halogen Family:

Group 17 of the periodic table have elements fluorine, bromine, chlorine, iodine and astatine. These are collectively termed as HALOGENS.  It is derived from two Greek words Halo and Gens means “Salt producer”. Since most of them subsist in Sea water.

General Trends:

Electronic Configuration: All such elements possess ns2np5 configuration.

                                               Table: Electronic Configuration of group 17 elements

1657_halogen family.jpg


Facts of Halogen Elements:

Here are few interesting facts about the halogen family.

1) Fluorine is the primary element of this family and it is as well most abundant element among all the family members whereas astatine is the rarest.

2) Fluorine and chlorine present as gases at room temperature, bromine in liquid and iodine and astatine at solids.
Bromine is the only non metal which is liquid at room temperature.

3) Halogens are much reactive compounds, fluorine being the highest reactive element in the periodic table.

4) Fluorine, the high toxic element, was isolated in the year 1886 by Henri Moissan.

5) Chlorine was made by Scheele in late 1700s and it was confirmed to be an element by Davy in the year1810.

6) Iodine was introduced in the year 1811 by Courtois.

7) There is no double or triple bonds needed to elucidate the concepts of bonding in halogens.

8) Hydrogen chloride (HCl), a significant industrial product is made by employing chlorine as its major component

9) Bromine is generally employed for the preparation of disinfectants, dyes, and photographic chemicals.

10) Iodine is popularly utilized in iodized salts, a significant ingredient of human diet and as a radioactive isotope in the medical chaser technology.

 

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