Oxygen, of course, is a gas, polonium a metal, and the in-between elements, sulfur, selenium and tellurium, are all solids that show increasing metallic properties. In fact, tellurium (Te), which ...

As oxygen levels rise, the oxygen-labile [4Fe-4S] 2+ cluster is oxidized and converted to a [2Fe-2S] 2+ cluster. FNR cluster conversion is sensitive and rapid, occurring on a scale of minutes ...