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Edwin McMillan and Philip H. Abelson identify neptunium, the lightest and first synthesized transuranium element, found in the products of uranium fission. McMillan would found a lab at Berkley that would be involved in the discovery of many new elements and isotopes Discovery of Astatine (Corson, Mackenzie, Segré) Rhesus factor , Landsteiner First radio map of sky, Reber 14Carbon, Kamen and Ruben 7 January 1940 discovery of 3019 Kulin 13 January 1940 discovery of 1880 McCrosky 9 April 1940 discovery of 2639 Planman 3 August 1940 discovery of 1881 Shao 24 November 1940 discovery of 4162 SAF ---- 4 January 1940 Birth of Brian David Josephson 20 March 1940, Death of Ferdinand Ellerman in Pasadena, California, USA 24 March 1940 Death of Edouard Eugène Désiré Branly 17 June 1940 Death of Arthur Harden 30 August 1940 Death of Joseph John Thomson 31 August 1940 Death of Raymond Smith Dugan in Philadelphia, Pennsylvania, USA 8 October 1940, Death of Robert Emden in Zürich, Switzerland 11 October 1940 Death of Vito Volterra 24 October 1940, Death of Pierre Weiss
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