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Early transuranium elements. After the discovery of the neutron by Chadwick in 1932, the group led by Fermi in Rome. began bombarding different elements with neutrons to study the radioactivity induced through. (n,() reactions. The decay characteristics of the radioactivity in neutron-irradiated uranium was. interpreted to indicate that some of the products were probably transuranium elements. Similar. conclusions were reached by other research groups; for example in 1937 Meitner, Hahn and.
Polonium is a rare and highly radioactive element. It is found naturally in the atmosphere and in the earthâs crust, though in miniscule quantities.Marie Curie discovered the element in the late 19th century and named it after her native country of Poland (in Latin: Polonia).t has dozens of isotopes. One of the most common is polonium-210, which emits highly radioactive alpha particles; this was the isotope found on Yasser Arafatâs personal effects during Al Jazeeraâs initial investigation.