Group 16 is the third last group in the periodic table. This group is called the oxygen family or the chalcogens. The elements in this group are oxygen, sulfur, selenium, tellurium, polonium and livermorium. The first two elements are nonmetals, elements are in between are metalloids and the last two are metals Polonium and livermorium are radioactive. Oxygen (as O) is a colorless gas. 