[PAR] [TLE] Glenn T. Seaborg [SEP] Glenn Theodore Seaborg ( ; April 19, 1912February 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 of the elements. [PAR] [TLE] Actinide concept [SEP] The actinide concept in nuclear chemistry was first theorized by Glenn T. Seaborg in 1944, resulting in the extension of Dmitri Mendeleev's periodic table of the elements by placing a new actinide series, for elements 89–103, below the lanthanide series.  In later theoretical work, Seaborg proposed the transactinide series spanning elements 104–121 and the superactinide series containing elements 122–153.
[PAR] [TLE] Glenn T. Seaborg [ SEP ] Glenn Theodore Seaborg ( ; April 19 , 1912February 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 of the elements . [PAR] [TLE] Actinide concept [ SEP ] The actinide concept in nuclear chemistry was first theorized by Glenn T. Seaborg in 1944 , resulting in the extension of Dmitri Mendeleev 's periodic table of the elements by placing a new actinide series , for elements 89–103 , below the lanthanide series . In later theoretical work , Seaborg proposed the transactinide series spanning elements 104–121 and the superactinide series containing elements 122–153 .
The actinide concept in nuclear chemistry was first theorized by a chemist who won the Noble Prize in Chemistry in what year ?
The actinide concept in nuclear chemistry was first theorized by a chemist who won the Noble Prize in Chemistry in what year ?
1951
1951