Adapted from an image by U.S. Navy (public domain), via Wikimedia Commons.
1913–2004
Philip Abelson
Announced neptunium in 1940.
Element
93NpNeptunium
1940
In 1940 Edwin McMillan and Philip Abelson, at Berkeley, hit uranium with neutrons and found a new element among the products, the first heavier than uranium. They named it neptunium, after the planet beyond Uranus.
Keep exploring
Where the dates and stories on this page come from; each event on the timeline links to its own source.
- Philip AbelsonEncyclopaedia Britannica
- NeptuniumRoyal Society of Chemistry
- Philip AbelsonWikipedia