where are halogens on the periodic table facts, news, stories and more



The halogens are a group of elements located in Group 17 of the periodic table, also known as Group VIIA of the old IUPAC system. The halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). These elements are characterized by having seven valence electrons in their outermost electron shell, which allows them to easily form compounds with other elements.Fluorine is the first element in the halogen group, and it is the most chemically reactive of the halogens. It is a pale yellow, highly toxic gas that is used in the production of uranium and other radioactive elements. Fluorine is also used in the production of semiconductors and other electronic materials.Chlorine is the next element in the halogen group and is a greenish-yellow gas that is widely used in the production of chemicals such as PVC and in the purification of drinking water. Chlorine is also used as a bleaching agent in the production of paper, textiles, and other materials.Bromine is the third element in the halogen group and is a reddish-brown liquid that is used in the production of flame retardants and other chemicals. It is also used as a disinfectant and in the production of photographic film.Iodine is the fourth element in the halogen group and is a violet-black solid that is used in the production of thyroid hormones and in the treatment of certain medical conditions. It is also used as a disinfectant and in the production of photographic film.Astatine is the last element in the halogen group and is a radioactive element that is produced in small amounts in the decay of other elements. It is used in certain medical treatments and in the production of certain semiconductors.In conclusion, the halogens are a group of elements located in Group 17 of the periodic table. They include elements such as fluorine, chlorine, bromine, iodine, and astatine. These elements are characterized by having seven valence electrons in their outermost electron shell, which allows them to easily form compounds with other elements. They are widely used in various industrial and medical applications.