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101
Thales of Miletus-600B.C.
He is the most famous philosophical position. Cosmological Thesis. He helped Democritius. -
101
Democritus-400 B.C.
First person to think of the Atom. The Atomic Theory. -
101
Aristotle-400 B.C.
People believed him instead of Democritus, but Democritus was correct. -
Sir Isaac Newton
Gravity, Law of motion, Light Spectrum. He was public that Democritus was right. -
John Dalton
Atomic Theory of Matter had an experiment but no title. Matter is made up of atoms that are invisable and indestructable. All atoms are identical. Atoms of different elements combine in simple whole numbers to form compounds. Atoms can't be created or destroyed. -
Antoine Henri Becquerel
Uranium. Discovery of radioactivity. -
JJ Thomson
Cathode Ray tube. Discovered electron. Plum Pudding model. -
Robert Millikan
Oil Drop. This helped in determining the charge and mass of the electron. -
Rutherford
Gold Foil experiment. Proved there is a nucleus. Discovered the nucleus and proton. -
Bohr
Discovered the model for the atom. -
Francis Aston
Mass spectograph. Discovered many different Isotopes. Didn't know why there were Isotopes. -
Erwin Schrodinger
Schrodinger's model. Redicted the odds of where the electron would be. -
James Chadwick
Proved the neutron's existance.