Group of elements and there definition

alkali metalsalkaline earth metalsearly transition metalslate transition metalsbasic/poor metalsmetalloids/semi-metalsnon-metalshalogensnoble

In chemistry and atomic physics, main group elements are elements in groups whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements. Main group elements include elements in groups 1 and 2, and groups 13 to 18.