Glenn T. Seaborg
He led the research team that discovered plutonium in 1940, and discovered isolated-Uranium-233 in 1941. Seaborg and his friends also discovered americium, berkelium, californium, curium, einsteinium, fermium, mendelevium, and nobelium, and identified more than 100 element isotopes throughout the periodic table. He shared the 1951 Nobel Prize for Chemistry with Edwin M. McMillan.