1934 findings of Enrico Fermi and co-workers |
Periodic Table before World War II |
Otto Hahn, Lise Meitner, Fritz Strassmann--1936 or 1937, EkaRe, EkaOs, EkaIr and EkaAu | Hahn & Strassmann, December 1938 | Discovery of Element 93 |
Edwin M. McMillan | Philip Abelson |
Discovery of Element 94 |
Glenn T. Seaborg at Geiger-Muller counter and amplifier, 1941. | Joe Kennedy at 9237 San Antonio Avenue, South Gate, Christmas, 1940 | Art Wahl at Washington University |
Helen L. Griggs and Glenn T. Seaborg, Christmas 1941 in San Francisco |
Naming -- 92 Uranium (U) Uranus, 93 Neptunium (Np) Neptune, 94 Plutonium (Pu) Pluto |
The Chemical Properties of Elements 94 and 93 |