Halogens are a group of chemical elements found in Group 17 of the periodic table. This group includes five elements: fluorine, chlorine, bromine, iodine, and astatine. Halogens are known for their reactivity, especially with alkali metals, forming salts. For example, when sodium reacts with chlorine, it creates table salt, a common substance in our diets. These elements exist in different states at room temperature. Fluorine and chlorine are gases, while bromine is a liquid, and iodine is a solid. Halogens are used in various applications, such as disinfectants, light bulbs, and even in the production of certain types of plastics