{"id":40283,"date":"2024-06-11T10:30:00","date_gmt":"2024-06-11T08:30:00","guid":{"rendered":"https:\/\/rinconeducativo.org\/recursos-educativos\/sonia-cotelle-determino-semivida-torio-230-establecio-numero-atomico-polonio\/"},"modified":"2025-06-11T10:36:21","modified_gmt":"2025-06-11T08:36:21","slug":"sonia-cotelle-determined-half-life-thorium-230-established-atomic-number-polonium","status":"publish","type":"re_recurso","link":"https:\/\/rinconeducativo.org\/en\/recursos-educativos\/sonia-cotelle-determined-half-life-thorium-230-established-atomic-number-polonium\/","title":{"rendered":"Sonia Cotelle determined the half-life of thorium-230 and established the atomic number of polonium"},"content":{"rendered":"
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19 June 1896, Warsaw (Poland) \u2013 18 January 1945, Paris (France)<\/p>\n\n\n\n

She graduated in general, biological, and applied chemistry from the Sorbonne University (France). She specialised in radioactive sources and, in 1919, began her work as a researcher, joining the team of scientist Marie Curie<\/a> at the Institut du Radium (now the Curie Museum) in Paris (France), where she became head of the measurement department between 1924 and 1926.<\/p>\n\n\n\n

Between 1926 and 1927, she worked as a chemical scientist in the Faculty of Sciences and researched polonium and actinium in collaboration with Marie Curie. She also determined the half-life or average lifetime of ionium, the name by which thorium-230 was known at the time.<\/p>\n\n\n\n

Between 1927 and 1936, Cotelle lived in Czechoslovakia and determined the atomic number of polonium by X-ray<\/a> spectroscopy. At the end of this period, she returned to Paris, where she continued collaborating with pioneering teams in researching radioactive elements and compounds.<\/p>\n\n\n\n

She died as a result of several illnesses caused by the accidental ingestion of polonium while working in the laboratory in 1927.<\/p>\n","protected":false},"excerpt":{"rendered":"

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