Scientist ESD
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23 terms
Occitan | English |
|---|---|
| Lavoisier |  designed balance, performed quantitative experiments, Law of Conservation of Mass |
| Dalton | developed a system of naming elements, used circles and derivations of circles for elements |
| Berzelius | replaced diagrams with letters for elements |
| Thomson | discovered the electron, Plum pudding model |
| Bequerel | discovered radioactivity |
| Marie Curie | coined it |
| Mendeleev | arranged elements according to atomic mass, called it "Periodic Table" |
| Bohr | contributed to concept of energy levels to atomic theory, electrons move in circular orbits around nucleus, electrons jump to different energy levels |
| Rutherford | gold foil experiment, discovered nucleus |
| Democritus | propose that matter is made up of atoms |
| Millikan | oil drop experiment led to determine the charge of an electron |
| Chadwick | discovered the neutron, no charge, same mass as proton |
| Schroedinger | devised mathematical equation to describe likelihood of an electrons motion and its wavelike pattern |
| Planck | proposed light energy is emitted as particles carrying definite quantities of energy in small amounts |
| Einstein | proposed light is energy that behaves as particles, photoelectric effect |
| Debroglle | math equation to describe wavelength of an electron |
| Moseley | determined relationship of protons to atomic emission spectra, determined properties of each element, gave element atomic number based on protons |
| Goldstein | observed rays in cathode ray tube traveling opposite direction, rays had positive charge known as proton |
| Aufbau | electrons enter lowest energy level first |
| Hunds rule | pairs of electrons are not formed until each orbital of each level has one electron |
| Pauli | max number of electrons in each orbital is 2 with opposite spins |
| Dalton | tiny indivisible particles called atoms, combined, seperated, rearranged, subdivided, created, destroyed, size mass are identical |
| Soddy | discovered isotope |
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