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
Radium bromide those two chemicals are chosen for the fractional crystallization. Once the radium is separated, radium bromide can be formed by dehydrating the dihydrate with a dry air stream at 200°C. Another method is to heat radium chloride to red heat with a dry hydrogen bromine gas stream. Radium and radium salts were commonly used for treating cancer. However, many treatments that were used in the early 1900s are not used anymore because of the harmful effects radium bromide exposure caused. Some examples are anaemia, cancer, and genetic mutations. Health effects from harmful amounts of radium exposure are tricky to diagnose