-
400
Aristotle- 400BC
He believed that everything was made from earth, water, fire and air. -
400
Democritus-400BC
He didnt have a experriment. He said the atomic theory and was first person think of the atom. -
Oct 7, 600
Thales of Miletus- 600BC
He said the Cosomological Thesiand he was the first philosopher. -
Issac Newton- 1670
He had the first physical experiment and he made gravity, laws of motion and light spectrum. -
John Dalton-1807
He came up with many theorys about matter and atoms. -
JJ Thompson-1887
He discovered the electron did the Plum Fudding Model and the Cathade Fay Tube -
Antoine Henri Becquerel-1896
He had the Uranium Experiment and he discorvered radioactivity. -
Robert Millikan-1909
He did the Oil Drop Experiment and determined the mass and charge of an electron. -
Rutherford-1911
He did the Gold Foil Experiment, he dicovered the nucleus. Also dicovered the proton. -
Neils Bohr- 1913
He believed that electrons traveled in paths. -
Francis Aston-1919
Mass- Spectrograph Experiment was what he was known for and for dicovering diffrent isotopes. -
Erwin Schrodinger-1926
He did the Schrodingers Model and he predicted where the electron would be at.