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322
Aristotle 322 B.C.
He didn't have and experiment.
His main contribition was that he didn't believe in the atomic theory. -
460
Democritas 460 B.C-370 B.C
He had no experiment.
His main contribute was that atoms were distructable. Also thought of the idea of the atom. -
Jan 2, 600
Thales of Miletus 600 B.C.
No experiment.
Main contribute was that everything is made out of something.
He had no model. -
Sir Isaac Newton 1704
He didn't have an experiment.
His main contribute was that all atoms moved around, they where really small. -
John Dalton 1803
He didn't have an experiment.
His main contribute was that he came up with the atomic theory -
Becqueral 1896
His main contribute was that he discovered Radioactivity. -
J.J. Thompson 1897
His main contribute was that he discovered the electron -
Robert Millikan 1908-1917
His main contribute was determining the charge and mass of an electron. -
Bohr 1915
His main contribute was that he discovered that electrons and atoms are in orbits, but electrons are on a fixed path. -
Francis Aston 1922
His main contribute was that he discovered the Isotopes. -
James Chadwick 1932
His main contributw was he came up with the electron. -
Schrodinger 1962
His main contribute was the math equation how to discribe the probabitility of where an electron will be.