Glenn T. Seaborg (April 19, 1912 – February 25, 1999) was an American chemist whose involvement in the synthesis, discovery and investigation of ten transuranium elements earned him a share of the 1951 Nobel Prize in Chemistry. His work in this area also led to his development of the actinide concept and the arrangement of the actinide series in the periodic table. He was the principal or co-discoverer of ten elements, including seaborgium, which was named in his honor while he was still living. This 1950 photograph depicts Seaborg in a laboratory with an elution column used for the ion exchange of actinide elements.Photograph credit: unknown; restored by Bammesk