Genuine spare part for select models of Hoover fridge freezers. Faulty products will replaced upon receipt of the faulty item unless authorized by us.
Strontium was recognized as a new element in 1790 when Adair Crawford analyzed a mineral sample from a lead mine near Strontian, Scotland. Until then scientists had thought strontium and barium were the same element, and only bariumâs existence had been recognized. The mineral took its name from the Scottish town and was called strontianite (strontium carbonate).
History. Radium was discovered in 1898 by Madame Curie in the pitchblende or uraninite of North Bohemia, where it occurs.There is about 1 g of radium in 7 tons of pitchblende. The element was isolated in 1911 by Mme.istory. Radium was discovered in 1898 by Madame Curie in the pitchblende or uraninite of North Bohemia, where it occurs.