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Radium is a chemical element; it has symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra 3 N 2).
The company is notable for being involved in the radium poisoning of the Radium Girls. The workers in the factories were told that the radium paint was harmless. Radium's negative health effects were well-known at the time, however it was thought that small amounts of radium were not dangerous and even a cure for lack of energy. [1]
In August 1921, von Sochocky was forced from the presidency, and the company was renamed the United States Radium Corporation, [3] Arthur Roeder became the president of the company. [4] In Orange, where radium was extracted from 1917 to 1926, the U.S. Radium facility processed half a ton of ore per day. [3]
November 1917 ad for an Ingersoll "Radiolite" watch, one of the first watches mass marketed in the USA featuring a radium-illuminated dial. Radium was discovered by Marie and Pierre Curie in 1898 [1] and was soon combined with paint to make luminescent paint, which was applied to clocks, airplane instruments, and the like, to be able to read them in the dark.
Promethium is not an easy image to find, however, out of all the elements without a picture, it is one of the two most likely to have a picture discovered. The only pictures floating around the place are of promethium chloride and promethium oxide, but not the metal itself. This is likely because the metal is not used for anything, it's hard to ...
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This personalized cheese board is the perfect Valentine’s Day gift for anyone who loves to host. It’s made from marble and acacia wood in the shape of a heart, and for a small extra fee, you ...
Three people have been charged with selling forged Jason Kelce memorabilia worth approximately $200,000, authorities in Pennsylvania said. Robert Capone, 51, of Philadelphia; LeeAnn Branco, 43, of ...