1875-1900GS

This picture comes from: [] Name: J.J Thomson DOB-DOD: Dec. 18th 1856- Aug. 30th 1940 Country of Origin: Manchester, England

JJ Thomson was born in Cheetham Hill on December 18, 1856. He attended and became a fellow of Trinity College in 1880, when he was Second Wrangler and Second Smith's Prizeman, and he remained a member of the College for the rest of his life, he then became a Lecturer in 1883 and Master in 1918. JJ Thomson made one of the most pivital discoveries in the history of chemistry. JJ Thomson dicovered the electron in 1897 thus creating a whole new picture of the atom, he also discovered the isotope in 1913. He later discovered the natural radioactivity of potassium and the fact that hydrogen was a single electron atom.

JJ Thomson's discovery of the electron helped shaped a whole new picture for the atom, and this greatly contributed to it.

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This Picture comes from: [] Name: Wilhelm "Rontgen" Roentgen DOB-DOD: March 27th, 1845- Feb. 10th 1923 Country of Origin:

Wilhelm Roentgen was born March 27th 1845 Lennep Germany. He enrolled in the University of Utrecht in 1865 to study Physics. He then took an examination and became a student at polytechnic studying mechanical engineering. He became a lecturer at Strassbourg University. His major claim to fame came with his discovery of the x-ray, named after himself. Wilhelm Rontgen was a German Physicst who in November 1845 produced and detected electromagnetic radiation in a wavelength range today known as an x-ray. This great achievement earned him the first nopel prize in Physics. This discovery of rays called x-raysd also greatly benefited the atom as we know it.

This picture comes from: [] Name: Henri Becquerel DOB-DOD: 1852-1908 Country of Origin: Paris, France

Henri Becquerel was born in Paris, France. He was born into a family filled with esteemed scientists, so naturally he studied science and engineering when he went to school. Henri was the third in his family to have the physics chair at the National Muesuem of Natural History. In 1894 he was appointed chief engineer at the department of roads and bridges. In 1896 Henri was studying phosphorescence in uranium salts, at this time he accidentally discovered radioactivity.

Henri's contrubution to the atom was while studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off very pentrating rays.