Adapted from an image by Nobel foundation (public domain), via Wikimedia Commons.
1905–1989
Emilio G. Segrè
Discovered technetium (1937) and astatine (1940).
Elements
43TcTechnetium
1937
Technetium was the first element made artificially. In 1937, in Palermo, Carlo Perrier and Emilio Segrè found it in molybdenum that had been bombarded in Berkeley's cyclotron, and named it after the Greek for artificial.
85AtAstatine
1940
In 1940 Dale Corson, Kenneth Ross MacKenzie and Emilio Segrè, at the University of California, made element 85 by firing alpha particles at bismuth. They named it astatine, from the Greek for unstable.
Keep exploring
Where the dates and stories on this page come from; each event on the timeline links to its own source.
- Emilio G. SegrèEncyclopaedia Britannica
- TechnetiumRoyal Society of Chemistry
- AstatineRoyal Society of Chemistry
- Emilio G. SegrèWikipedia