Group 17 elements form

Answer 1

Group 17 elements, also known as the halogens, form when atoms of these elements combine in chemical reactions. The group 17 elements include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). These elements are highly reactive nonmetals and tend to form 1- ions by gaining one electron to achieve a full outer electron shell. For example, chlorine (Cl) can react with sodium (Na) to form sodium chloride (NaCl) by gaining one electron from sodium. Similarly, bromine (Br) can react with potassium (K) to form potassium bromide (KBr) by gaining one electron from potassium. The reactivity of the halogens decreases from fluorine to iodine as you move down the group due to the increasing atomic radius and shielding effect. Astatine (At), the heaviest halogen, is radioactive and exists as a rare and unstable element.