Democritus
Published on Nov 20, 2015
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Democritus
- Used philosophy, not science
- Atoms were indivisible and indestructible
- Everything is made up of atons
John Dalton
- John Dalton was born into a Quaker family in Cumberland, England
- He said that all matter is made up out of very small things he called atoms
- In his model the Nucleus was unknowin
J.J. Thomson
- Thomson discovered the electron in 1897
- People realized that atoms were made up out of even smaller particles
- He called his atomic model "Plum Pudding"
- The model is made up out of negative electrons that float in positive charge
- No one knew how the electrons were in the atom was arranged
Ernest rutherford
- His model described atoms as tiny, dense and positively charged
- It had a positively charged core called the Nucleus
- The Nucleus was by lighter, negative charged atoms
- The atom in the model was like a mini solar system
- The model can be known as a planetery model of an atom
Ernest rutherford
- His model described atoms as tiny, dense and positively charged
- It had a positively charged core called the Nucleus
- The Nucleus was by lighter, negative charged atoms
- The atom in the model was like a mini solar system
- The model can be known as a planetery model of an atom
Neils bohr
- Rutherford's model had problems
- It didn't explain the light the electrons gave off
- Bohr solved the problem
- Electrons orbit the Nucleus a certain way in different energy levels
James chadwick
- In 1932 Chadwick discovered the neutron and measured its mass
James chadwick
- In 1932 Chadwick discovered the neutron and measured its mass
Erwin Schrodinger
- He made a powerful model of the atom in 1926
- The model is about the electron is a wave
- It tells you the probability where the electron can be found
- The model can't tell us where the electron is anymore
- The model only tells you where it might be
