👉 The term "dihalogen" refers to a group of halogens, which are a type of non-metal that can form ionic bonds with other non-metals. Halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and neon (Ne). These halogens have the following chemical properties: - Fluorine has the formula F, which is a halogen with the number of valence electrons equal to its atomic number.