Write short notes on the following types of elements –

halogens

Halogens —

1. The elements of group 17 [VIIA] from ⁹F [Fluorine] to ⁵³I [Iodine] are called Halogens. They are called Halogens as Halogens means salt producer and these elements react with metals to form salts.
2. They are non-metals and are univalent with seven valence electrons in their outer shell. This makes them strong oxidising agents as they readily accept one electron to achieve stable electronic configuration.
3. They are highly reactive, electronegative non-metals.
4. They are bad conductors of heat & electricity.
5. They form covalent compounds with non-metals. e.g. HCl, PCl₃.