Discovery of Neptunium
Co-discovers neptunium, the first transuranium element, extending the periodic table beyond uranium.
Historical biography archive · Updated 2026-11-03
Edwin Mattison McMillan Biography and Timeline
Follow Edwin Mattison McMillan through 2 dated historical records for United States of America.
Edwin Mattison McMillan, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1940–1945Years on this page
1940
1945
Electron Synchrotron Principle
Introduces phase stability for cyclic accelerators, making high-energy electron synchrotrons practical.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.