Adapted from an image by NN (University of Michigan) (public domain), via Wikimedia Commons.
1887–1975
Kazimierz Fajans
Discovered protactinium in 1913.
Element
91PaProtactinium
1913
In 1913 Kazimierz Fajans and Oswald Göhring found a short-lived element between thorium and uranium. In 1918 Lise Meitner and Otto Hahn, in Berlin, found a long-lived form and named it protoactinium, later shortened to protactinium, because it decays into actinium.
Keep exploring
Where the dates and stories on this page come from; each event on the timeline links to its own source.
- Kazimierz FajansEncyclopaedia Britannica
- ProtactiniumRoyal Society of Chemistry
- Kazimierz FajansWikipedia