1900-1915+AD

Ernest Rutherford (1909) Rutherford and Bohr when working together created the Rutherford-Bohr model. Rutherford recieved his B.S. in chemistry and geology in 1894 from Canterbury College, New Zealand.

Robert Millikan (1909) http://en.wikipedia.org/wiki/Robert_Andrews_Millikan Robert Millikan was an American physicist who was born on March 22, 1868. He was also "a Nobel laureate in physics for his measurement of the charge on the electron and for his work on the photoelectric effect. He served as president of Caltech from 1921 to 1945...Starting in 1909, while a professor at the University of Chicago, Millikan and Harvey Fletcher worked on an oil-drop experiment (since repeated, with varying degrees of success, by generations of physics students) in which they measured the charge on a single electron. Professor Millikan took sole credit, in return for Fletcher claiming full authorship on a related result for his dissertation.[2] Millikan went on to win the 1923 Nobel Prize for Physics, in part for this work, and Fletcher kept the agreement a secret until his death."( en.wikipedia.org/wiki/Robert_Andrews_Millikan). Millikan passed away on December 19, 1953.

Niels Bohr (1912)