Lesson: Halogens Science • Second Year of Preparatory School

Students will be able to

• identify the location of the halogen group on the periodic table,
• identify and name the elements in the halogen group,
• describe the physical properties of halogens and how these change when descending the group,
• write word and symbol equations for the reactions of halogens with metals to form salts,
• describe how the reactivity of halogens decreases when descending the group,
• state that all the elements of the halogen group contain seven electrons in their outer shell,
• state that all the elements of the halogen group gain one electron to form negative ions with a charge,
• know that halogens usually exist as diatomic molecules,
• know that elements of the halogen group are reactive and are often found in nature as compounds (except At),
• describe how halogens can displace each other in a solution depending on their position in the group.