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Since uranium had been named after the planet Uranus and neptunium after the planet Neptune, element 94 was named after Pluto, which at the time was also considered a planet. Wartime secrecy prevented the University of California team from publishing its discovery until 1948.
With his colleagues at the University of California at Berkeley, Glenn Seaborg discovered the element plutonium in late 1940. He went on to identify several more of the radioactive “transuranium” elements—so named for their position following uranium in the periodic table—and received a Nobel Prize in 1951.
Seaborg, together with Arthur C. Wahl and Joseph W. Kennedy, produced and identified the second known transuranium element, plutonium (atomic number 94), on February 23, 1941, in Room 307 of Gilman Hall, which is now a National Historic Landmark.
13 Δεκ 2021 · Virginia Grant Writer. The element plutonium was discovered only 81 years ago, but its impact on the world has been monumental. On December 14, 1940, chemist Glenn Seaborg and his colleagues at the Berkeley Radiation Laboratory used a 60-inch cyclotron to bombard the element uranium with deuterons.
My co-workers and I (Edwin McMillan, Joseph Kennedy and Arthur Wahl) first synthesized and identified, that is, discovered, plutonium (atomic number 94, symbol Pu) at U.C. Berkeley on the night of February 23-24, 1941. We found this plutonium in the form of isotope 238 Pu.
5 Ιουν 2014 · Plutonium was first produced and isolated on December 14, 1940 by Dr. Glenn T. Seaborg, Joseph W. Kennedy, Edwin M. McMillan, and Arthur C. Wahl by deuteron bombardment of uranium in the 60-inch cyclotron at the University of California, Berkeley.
Early in 1941, Seaborg and his assistants confirmed the identity of another artificial element – number 94 – produced by bombarding uranium with deuterons. Since the new elements followed ...
