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John Dalton
The atomic theory was then changed to described the atom more corectly. Dalton's theory has changed alot. -
JJ Thomson
In 1897 JJ Thomson showed that there was a mistake the the Dalton's Theroy. Thomson discoverd that there are small particles inside the atom. -
Rutherford 1909
Rutherford started with the Thomson idea that atoms are soft "blobs" of matter, He expected the particles to pass right through gold in a dtraight line. -
Democritus 440 BC
Democritus belived that you would never end up with a particle that could not be cut up. -
Rutherford 1911
An element such as radium produced the particles. Than the lead stop all of the positive particles except for a small stream aimed at a gold-foiled target. -
Bohr
He stuied the way that atoms reach to the light . -
Schrodinger and Hesienberg
They explained the nature of electrons in the atom. -
Aristotle 382 BC
Aristotle made the four elements.water, fire, earth, air
