Sickels Atomic Theory

Events

Democritus

460 BCE - 370 BCE

Democritus' thoughts were later used in Daltons work

Dalton

1776 - 1844

Billiard ball model

Faraday

1791 - 1867

Crookes

1832 - 1919

cathode ray tube

Rontgen

1845 - 1923

x-rays

Goldstein

1850 - 1930

proton

Thomson

1856 - 1940

electron
plum pudding

Millikan

1868 - 1953

oil drop experiment

Rutherford

1871 - 1937

gold foil experiment

Becquerel

1896

gamma rays

Becquerel

1896

gamma rays
beta particle