Group 1: Category name is Alkali metals. Alkali metals form salt and other compounds. Alkali metals in group 1 are also less dense than the other metals and have ion with +1 charge making it positive. They are highly reactive and have the largest size of elements In the table.
Group 2: Category name is Alkaline Earth Metals. These are metals made of many compounds and have ions with a +2 charge have smaller atoms that alkali metals
Group 7: Category name is Halogens. these types of elements are found in bleach, disinfectants and salts. They form ions with negative charge -1 and are highly reactive.
Group 8: Category name is Noble Gases. these elements are not reactive and are used to make lasers and light signs. Have really low tendency to loose or gain electrons.