Question: what groups of elements on the periodic table?
Answer: Group 1: the alkali metals (lithium family) *not including hydrogen.
Group 2: the alkaline earth metals (beryllium family)
Groups 3-12: the transition metals.
Group 13: the triels (boron family)
Group 14: the tetrels (carbon family)
Group 15: the pnictogens (nitrogen family)
Group 16: the chalcogens (oxygen family)