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Democritus (450 BC) - Coggle Diagram
Democritus (450 BC)
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John Dalton (1803)
- Everything is made out of some things called Atoms
- Atoms of its own element are the same while different elements have different atoms
- Different atoms can form different compounds in constant ratios
- Conservation of atoms is rearrangement of RXN
JJ. Thomson (1896)
- Discovered that atoms have negative charges called electrons
- Figured out the electron charge to mass ratio
- Idea was that electrons are in a uniformed positive charge state
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Ernest Rutherford (1909)
- Positive charge is in concentrated state called the nucleus
- Positive charge is a Proton and a no charge is a Neutron
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Niels Bohr (1911)
- Electrons orbit the nucleus
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Erwin Schrodinger (1926)
- Used equations to predict the probability of where the electron would be
- Area where the "cloud" is more dense is where it is more likely to be
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- Electrons follow a path around the nucleus in a circular motion
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