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*Chemistry
important people
| Question | Answer |
|---|---|
| J.J Thomson (1900's) | -Cathode rays are a stream of negatives particles (electrons). -Charge to mass ratio (1.76x10^8 C/g) -Atom is ball of positive charge w/ negatively charged particles embedded (electrons) |
| Robert Millikan (1900's) | -Oil drop experiment -Charge and mass of electron |
| E. Goldstein (1900's) | Found 'canal rays' which are protons |
| Ernest Rutherford (1900's) | -Gold foil experiment -shot alpha radiation at gold foil ~most went straight through ~some deflected (1/8000) -Atom is empty space w/small dense positive region containing atom's mass (nucleus) |
| John Dalton (17-1800's) | -Father of Modern Chemistry |
| Francis Bacon (1500's) | -Heat is motion by very small particles -importance of experiment -facts not derived from authority (contradict held belief) |
| Galileo (1500's) | -proposed there was matter too small to see in chemical changes |
| Robert Boyle (1600's) | -pressure/volume relationship of gases |
| Lavoisier (1700's) | -systematic names for elements -combustion involved material's oxygen -important accurate weight measurements -Law of Conservation of Mass |
| Proust (1700's) | -Law of Definite Proportions ~elements in compound always in same ratio of masses |
| James Chadwick (1900's) | -existence of neutrons -difficult to find because of no charge |
Created by:
mason23
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