calcium / beryllium belongs to alkaline earth metal family , group 2 on the periodic table
calcium is alkaline_earth_metal. group_2_elements is alkaline_earth_metals. beryllium is metallic_element. beryllium is chemical_element. calcium is metallic_element. calcium is element. one_of_chemical_elements is calcium. group_1_elements is alkali_metals. one_of_chemical_elements is beryllium.