1900+-+1915GS

This picture comes from: [] Name: Robert Millikan DOB-DOD: March 1868- Dec.19th 1953 Country of Origin: Morrison, Illinois USA

Robert Millikan was an American Physicist and Nobel Laureate in Physics for his measurement of the charge of the electron, as well as, his work on the photoelectric effect. He served as president of Caltech from 1921- 1945. He had many great achievements in his life, but his number one achievement was from his oil drop experiment which helped shape the atomic structure of an atom by determining the charge and mass of an electron.

Robert Millikan contributed to the atomic structure by his Oil drop experiment that determined the charge (e=1.602 x 10-19 coulomb) and the mass (m = 9.11 x 10-28 gram) of an electron. This picture comes from: [] Name: Marie Curie DOB-DOD: Nov. 7th, 1867- July 4th, 1934 Country of Origin: Warsaw, Poland

Marie Curie was born in Warsaw Poland on Nov. 7th 1867. She has basic schooling, and was influenced into science by her father. She met her husband Pierre Curie who was professor in the school of Physics. Together they began their study and research on radioactivity, after being inspired by Henri Becquerel. This led to them isolating polonium. Marie Curie was an advent promoter of the use of Radium to alleviate pain, especially for soldiers during WW1. Her research gave her the Nobel Prize in Physics as well as the Nobel Prize in Chemistry.

Marie Curie's contribution to the Atomic structure was her Study of uranium and thorium and called their spontaneous decay process "radioactivity". She and her husband Pierre also discovered the radioactive elements polonium and radium.

This picture comes from: [] Name: Ernest Rutherford DOB-DOD: August 30th,1871- Oct. 19th 1937 Country of origin: New Zealand

Ernest Ruherford was born in Brightwater, New Zealand. He was a chemist and a physicist who became known as the father of Nuclear Physics. Ernesst studied at Canterbery College, University of New Zealand, and also at the University of Cambridge in England. Ernest Rutherford made very important discoveries in the field of radiation. He dicovered and named the three types of radiation alpha,beta, and gamma. Rutherfords' gold foil experiment which probed the structure of an atom is very famous today in the science world as well. An interesting fact about him is that Ernest also discovered the half-life of radioactive materials, which were important in the progress of the Manhattan Project which was the developing of the Nuclear Bomb.

Rutherford's contribution to the atomic structure was in 1898 when he Studied radiations emitted from uranium and thorium and named them alpha and beta. His gold foil experiment also helped form the structure of an atom.

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