Democritus
Published on Nov 24, 2015
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Democritus
- Used philosophy, not science
- Atoms were indivisible and indestructible
- Everything is made up of atoms
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John Dalton
- John proved that everything was made up of atoms
- Used Science
- Elements are made of extremely small particles called atoms
- Atoms cannot be subdivided created or destroyed
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J.J. Thomson
- Discovers the electron
- That lead to his "Plum pudding" model
- He thinks electrons are in a sphere of positive electrical charge
- Electrons are negatively charged
- Matter is neutral- no charge-because charges cancel.
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Ernest Rutherford
- Finds out an atom has a small, dense, positively charged nucleus
- When you hit the Nucleus it bounces somewhere else it doesn't go through
- Discovered the Nucleus
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Neils bohr
- Came up the the quantum theory
- Found the structure of an atom
- Found the radiation of a atom
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erwin schrodinger
- Took the Bohr model further.
- Used math equations to find an electron in a certain position
- This model introduced the concept of sub-energy levels.
Photo by Leo Reynolds
