Actinide concept
Encyclopedia
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.
Glenn T. Seaborg
Glenn Theodore Seaborg was an American scientist who won the 1951 Nobel Prize in Chemistry for "discoveries in the chemistry of the transuranium elements", contributed to the discovery and isolation of ten elements, and developed the actinide concept, which led to the current arrangement of the...
in 1944, resulting in the extension of Dmitri Mendeleev
Dmitri Mendeleev
Dmitri Ivanovich Mendeleev , was a Russian chemist and inventor. He is credited as being the creator of the first version of the periodic table of elements...
'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.