Discovery of Francium
Discovers francium as a decay product of actinium, filling atomic number 87 near the bottom of the alkali-metal group.
Historical biography archive · Updated 2026-11-03
Marguerite Perey Biography and Timeline
Follow Marguerite Perey through 1 dated historical records for France.
Marguerite Perey, historical timeline
A chronological timeline drawn from matching World History Database records.
1Distinct records
1 of 1Page
1939–1939Years on this page
1939
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.