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Graden Kirksey, professor emeritus of chemistry and former department chairman at the University of Memphis, will deliver a lecture on Friday, Oct. 30, at 2 p.m. in 134 Chemistry Building. In 1906, Dmitrii I. Mendeleev was denied the Nobel Prize in Chemistry by a vote of 5 to 4. He failed to predict “inert” gases. In his talk, Kirksey will describe the noble gases and inner transition elements that could have been predicted in 1871, and the incipient periodic table having 18 groups supporting 88 elements from hydrogen through uranium that could have hung in Professor Charles C. Thach’s analytical chemistry class in Samford Hall in 1893. Kirksey received his Ph.D. in physical chemistry from Auburn University. His publications include textbooks for inquiry-based physical science, manuals for undergraduate instruction and articles in refereed journals. The event is free and open to the public.