These are the chalkagens, the group 16 elements. While their name means copper or formers, they should really be thought of as simply or formers. Because they all have room for two electrons in their outer shells, they readily bond with metals forming compounds. It may be hard to believe, but 46% of the earth's crust is oxygen because it's so easily bonds with silicon, iron, copper, and other elements. Oxygen also makes up 65% of our bodies. Well, 65% of your body, I'm 100% Mendelevium. Sulphur forms pyre and iron ore and bonds with lead to form galena. Oxygen, sulfur, selenium, and talerium all bond with gold forming various ores known as gold chalkogenides. However, polonium is too scarce to form any notable compounds and an uninexium does not occur naturally.