Uranium-235 was discovered by a person who was born after August.
Arthur Jeffrey Dempster -LRB- August 14 , 1886 -- March 11 , 1950 -RRB- was a Canadian-American physicist best known for his work in mass spectrometry and his discovery of the uranium isotope 235U .. Canadian. Canadians. American. United States. physicist. physicist. mass spectrometry. mass spectrometry. uranium. uranium. isotope. isotope