Democritus
460-370BCE

Aristotle
384-322BCE

Robert Boyle
1627-1691

John Dalton
1766-1844

Eugen Goldstein
1850-1930

Joseph John Thompson
1856-1937

Ernest Rutherford
1871-1937

Henry Moseley
1888-1915

James Chadwick
1891-1974

Niels Bohr
1885-1962