1.    Antoine Lavoisier (1770s French)
 

2.    Joseph Proust (1799 French)
 

3.    John Dalton (1803 English) and his Atomic theory
 

4.    William Crooke (1870 English)
 

5.    J.J. Thomson (1890s, English)

        His experiment and conclusion
        New Atomic theory

6.    Robert Millikan (1911, American)

        His experiment and conclusions
 

7.    Lord Ernest Rutherford (1909, English)

        His experiment and conclusion
        New Atomic theory
        Shortcoming

8.    Niels Bohr (1913, Danish)

        His experiment and conclusions
        New atomic theory

9.     Albert Einstein (1905,German/American)
 

10.    Max Planck (early1900,German)
 

11.    Louis de Broglie (1923, French)
 

12.    Werner Heisenberg (mid-1920, German)
 

13.    Erwin Schrodinger (mid1920, German)