Halogens are a group of elements in Group 17 of the periodic table known for their high reactivity and tendency to form salts with metals. They include fluorine, chlorine, bromine, iodine, and astatine.
5 Must Know Facts For Your Next Test
Halogens have seven valence electrons, making them highly reactive.
They readily form negative ions by gaining one electron to achieve a stable octet.
Halogens exist in various physical states at room temperature: fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid.
They have high electronegativities and are strong oxidizing agents.
Halogens form diatomic molecules (e.g., F2, Cl2) in their elemental state.