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
The Galena Territory, Illinois The Galena Territory, Illinois The Galena Territory is a census-designated place in Jo Daviess County, Illinois, United States. Its population was 1,058 as of the 2010 census. The community consists of a private development located several miles southeast of downtown Galena. The Territory, which is managed by a homeowners association, has set aside of protected recreational land. The remainder is filled with low-density residential development and Eagle Ridge Resort & Spa. As of August 2017, there were 4,082 property owners, 554 permanent residences, and 1,675 vacation residences. The community includes an owners’ club, which houses recreational facilities for property owners