Period 5 element Klaproth named the new element in 1798 after the Latin word for "earth", "tellus". Gold telluride minerals (responsible for the name of Telluride, Colorado) are the most notable natural gold compounds. However, they are not a commercially significant source of tellurium itself, which is normally extracted as by-product of copper and lead production. Tellurium is commercially primarily used in alloys, foremost in steel and copper to improve machinability. Applications in solar panels and as a semiconductor material also consume a considerable fraction of tellurium production. Iodine is a chemical element with the symbol I and atomic number 53. The name
CU Online earned through traditional on-campus courses; even if a student completes an entire program online, the degree is awarded with the same benefactor, University of Colorado. CU Online offers courses in liberal arts and science, arts and media, business, education, engineering, public affairs, and architecture and planning. Below are the complete degree programs and certificates that can be completed exclusively through online courses. CU Online CU Online is one of the first fully accredited online education programs, created in 1996 by the University of Colorado Denver (CU Denver). With CU Online, the pedagogy of CU Denver faculty has been extended globally,