Chemistry Scientists
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Created by:
oO0Fischer0Oo on March 23, 2011
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11 terms
Terms | Definitions |
|---|---|
 Ernest Rutherford | British physicist (born in New Zealand) who discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937) Unfortunately, it did not explain how the electrons were arranged or why they didn't fall into the oppositely charged protons. |
| John Dalton | Th scientist who made an atomic theory. It wasn't accepted at first, but he still used it to predict how a pair of elements might combine. He said the atom looked like a bowling ball. |
| Antoine Lavoisier | Proved Law of Conservation of Mass. (Mass is neither created nor destroyed.) |
| Robert Millikan | Conducted and experiment in which he determined the mass of an electron and the actual charge. |
| Democritus | Was the first to suggest the world was made of atoms. However, he had no proof, and therefore no one believed him. |
| James Chadwick | With the help of Rutherford, he showed the nucleus a neutral particle called the neutron. |
| J.J. Thomson | Worked with the cathode ray tube and concluded that atoms emitted negative particles. These are now called electrons. |
| Robert Boyle | He was the first scientist to emphasize the need for experimental data and he gave us the experimental definition of an element. |
| Aristotle | Did not believe in atomsand viewed matter as continuous. He believed the elements were earth, fire, water, and wind. |
| Lord Kelvin | Created the "plum pudding" model of an atom. Said that atoms had a uniform body of positive spongey material with negative electrons scattered throughout. |
| Joseph Proust | Stated the Law of Definite proportions (constant composition) |
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