Radium seventh of a gram of radium. One kilogram of the Earth's crust contains about 900 picograms of radium, and one liter of sea water contains about 89 femtograms of radium. Radium was discovered by Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898, in a uraninite (pitchblende) sample. While studying the mineral earlier, the Curies removed uranium from it and found that the remaining material was still radioactive. They separated out an element similar to bismuth from pitchblende in July 1898, that turned out to be polonium. They then separated out a radioactive mixture consisting mostly of two
Uranium – Twisting the Dragon's Tail Uranium – Twisting the Dragon's Tail Uranium – Twisting the Dragon's Tail is a television documentary series about uranium, its history, and its uses. It was produced by Gene Pool Productions for PBS and SBS and premiered on both networks in late July and August 2015. The series was conceived, created, written and directed by Wain Fimeri, was shot in nine countries and is presented by Derek Muller. Derek Muller introduces uranium and its use throughout history. Uranium, originally sourced from pitchblende, became the subject of intense scientific study. Using computer-generated dragons as a metaphor for daughter isotopes, the episode