Uranium ore support a neutron-mediated chain reaction). Uranium, thorium, and potassium are the main elements contributing to natural terrestrial radioactivity. Uranium has the highest atomic weight of the naturally occurring elements and is approximately 70% denser than lead, but not as dense as tungsten, gold, platinum, iridium, or osmium. It is always found combined with other elements. Along with all elements having atomic weights higher than that of iron, it is only naturally formed in supernova explosions. The primary uranium ore mineral is uraninite (UO) (previously known as pitchblende). A range of other uranium minerals can be found in various deposits. These
Galena, Ohio Galena, Ohio Galena is a village in Delaware County, Ohio, United States. The population was 653 at the 2010 census. Galena was originally called Zoar, and under the latter name was platted in 1816. A post office called Galena has been in operation since 1834. Galena is located at (40.215214, -82.881757). According to the United States Census Bureau, the village has a total area of , of which is land and is water. As of the census of 2010, there were 653 people, 214 households, and 172 families residing in the village. The population density was . There were 237