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
Discover Financial Financial announced it would acquire Citigroup-owned Student Loan Corporation for $30/share. The deal finalized on December 31. On June 6, 2012, Tree.com, Inc. completed the sale of substantially all of the operating assets of its Home Loan Center, Inc. business to a wholly owned subsidiary of Discover Financial. In exchange for the assets sold, Discover paid an aggregate of $45.9 million including payments made prior to the closing which were applied to the closing price. On June 12, 2012, Discover began originating mortgages with its launch of Discover Home Loans, offering prime variable- and fixed-rate conventional and FHA home mortgage