A.+Grimner+Time+Line+Project

Democritus (460 BCE- 380 BC) John Dalton (1766-1844) Wilhelm C. Roentgen (1845-1923) Henri Becquerel (1852-1908) J.J. Thompson (1856-1940) Marie Curie (1867-1934) Robert Millikan (1868-1953) Ernest Rutherford (1871-1937) Neils Bohr (1885-1962) Erwin Schrodinger (1887-1961) James Chadwick (1891-1974) Werner Heisenberg (1901-1976)