Atomic Number
Establishes atomic number, placing uranium at 92.
Role range: 1887-1915
Historical biography archive · Updated 2026-11-03
Henry Moseley Biography and Timeline
Follow Henry Moseley through 3 dated historical records for Great Britain.
Henry Moseley, historical timeline
A chronological timeline drawn from matching World History Database records.
3Distinct records
1 of 1Page
1913–1914Years on this page
1913
Moseley Establishes Atomic Number Law
Henry Moseley's X ray spectroscopy linked element identity to nuclear charge. It connected industrial practice with more systematic technical investigation.
1914
Discovery of Atomic Numbers
Studies X-rays emitted by metals. Makes sense of the periodic table by stating elements can only have integral numbers
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.