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460
Democritus
Democritua was born around c.460 B,C he came up with the atomic theory and made many contributions to the scientific world he died in 370B.C -
John Dalton
John Dalton was born on september 6th 1776 Dalton was a very well known chemist and meterologist he was a very dedicated worker. Dalton found out that forces of repulsion that were thought to cause the pressure would only act between the same kind of atoms of a mixture. Dalton died on 27th of july 1884. -
William Crooke
William crooke was born on Jun,17,1832 his scientific career took off at the age of 15 he would soon go on to find the element thalium and also the problem of using a vacuum balance for his research. WIlliam Crooke died on William Crooke died on April 4th 1919 -
Gregor Mendeleev
Gregor Mendeleev was one of the greates scientist that ever lived he made many contributions to the field of science such as makeing a very acurate periodic table of elements that is still used today. Gregor mendel died on Febuary 2 1907 -
John Newland
John Newland was born on November 26, 1837 He was credited for coming up with the first periodic table of elements it did not get recognition until Mendeleev released his own verison. -
JJ thomson
JJ thomson was born on December 18 1856. JJ thomson was credited for discoverie on atoms he figured out that atoms were indeed divisble. Many scientist thought this was not true He also made the plum Pudding Model to further explain the positice charge of atoms.He died on August 30th 1940 -
Ernest Rutherford
Ernest Rutherford was born on August 30th 1871 he got into college at at very young age Ernest Rutherford is best know for his Atomic Model and his concept of a nucleus -
Niels Bohr
Niels Bohr was October 7th 1885 in Denmark,Germany Bohrs was the first person to invent the basis of quantom theory.Niel fled to America becuase he was being persucuted in Germany he ended helping American scientist develop the atomic bomb. Niel died on November 18th 1962 -
James Chadwick
James Chadwick was born on October 20th 1891 he did very well in school. Chadwick graduated with honors form his physics school during his years at colleges would work with sir Rutherford and sole radioactivity problemss.His greatest contribution to science was electrons devoid any electrical charge. Chadwick died died on July 24, 1974 -
Aristotle
Aristotle was born on 384BC he was a great teacher and leader during his life he knew nearly every thing there was to know.He did not belive in atoms. He did not think were moved by an external force.He died on 322 BC
