Adapted from an image by NASA (public domain), via Wikimedia Commons.
1914–2012
Dale R. Corson
Discovered astatine in 1940.
Element
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.
- Dale Corson dies at 97Cornell Chronicle
- AstatineRoyal Society of Chemistry
- Dale R. CorsonWikipedia