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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.
As there are only about a hundred natural elements in the universe, discovering two is quite a big thing! She called them polonium, after her home country of Poland, and radium because it was radioactive. Radioactivity is a very good word and it was invented by Marie Curie.Elements that were radioactive gave out strange, unknown rays that seemed to be very similar to the recently discovered X-rays.This is how she knew where to look for radium and polonium.s there are only about a hundred natural elements in the universe, discovering two is quite a big thing! She called them polonium, after her home country of Poland, and radium because it was radioactive. Radioactivity is a very good word and it was invented by Marie Curie.