Which Happened First?

Arthur Jeffrey Dempster

Arthur Jeffrey Dempster
Image: Unknown authorUnknown author · Public domain · source

Arthur Jeffrey Dempster was a Canadian-American physicist best known for his work in mass spectrometry and his discovery in 1935 of the uranium isotope 235U. As part of his research, he investigated the isotopic constitution of multiple other elements.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Who was born first?

Timeline

  1. Archibald HillSeptember 26, 1886 – June 3, 1977
  2. Arthur Jeffrey Dempster (this page)August 14, 1886 – March 11, 1950
  3. Edward Calvin KendallMarch 8, 1886 – May 4, 1972
  4. Frederick Lindemann, 1st Viscount CherwellApril 5, 1886 – July 3, 1957
  5. Manne SiegbahnDecember 3, 1886 – September 24, 1978
  6. Robert Julius TrumplerOctober 2, 1886 – September 10, 1956

Related

Play a round with Science · 19th century