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Atomic History
Chemistry
| Question | Answer |
|---|---|
| Democritus | if matter could be divided, it would not be able to put back together |
| Aristotle | He thought that all matter was made up of a combination of his four elements. This was proven wrong |
| John Dalton (4 points) [English] "Billard Ball Model" | 1.All matter is made up of atoms which are invisible and indestructible 2.All atoms of a given element are identical in mass and properties 3.Compounds are formed by a combination of two or more different kinds of atoms 4.REARRANGEMENT |
| Law of Conservation of Mass | the mass before = the mass after |
| Law of Definite Proportions | atoms combine in whole ratios |
| Law of Multiple Proportions | atoms can combine in many different ways |
| J.J. Thomson [American] | he discovered electrons "Plum Pudding Model" |
| Ernest Rutherford [Kiwi] | the majority of an atom is empty space but in the centre there is a positively charged very dense nucleus -discovered the nucleus |
| Neils Bohr [Danish] | each orbit holds few electrons electrons can jump between orbits - go up but want to come back down further the electron, the more energy it has the frequency of lights is given off depending on which shell it came from |
Created by:
jakiday
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