Atomic Scientists
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11 terms
Terms | Definitions |
|---|---|
 Democritus/ Leucrippus | discovered atoms. All matter are composed of atoms. Alchemists, 430 B.C. |
| John Dalton | Father of modern chemistry. Atomic theory( 4 parts) 1. All matter is made up of atoms- atoms are indivisible 2. Atoms of elements are identical 3. Atoms come in a set amount 4. In a chemical reaction, atoms can be seperated, joined, or rearranged. |
| Wrong parts of Dalton's Theory | 1. atoms have subatomic particles 2. different because of isotopes |
| William Crookes | experimented with the cathode ray. first to determine negative charges |
| Eugen Goldstein | discovered positive charges in the atom (Proton) |
| Thompson | discovered the electron, and developed the plum pudding model |
| Rutherford | gold foil experiment and created an atomic model |
| niels bohr | atomic model, explained rutherford model |
| James Chadwick | discovered neutrons |
| Millikan | measured charge of the electron |
| Sir Isaac Newton | three laws of motion. |
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