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101
Thales of Miletus 600 BC
Thought everything was was made of somthing; Such as the four elements. -
101
Democritus 460-370 BC
Thought everything was held together by atoms; Had the idea that there were atoms. -
101
Aristotle 384-322 BC
Thought everything was made of the four elements; same as Thales of Miletus. -
Isaac Newton
Thought everything was held together by atoms; Like Democritus. -
Dalton
He created the Atomic theory. -
Bequerel
Discovered radioactivity. -
Thompson
Discovered the electron,
and how it was lighter than a hydrogen atom. -
Erheir Rutherford 1904-1911
Discovered atoms containing a neceleus and made protons surrounded by electrons. -
Robert Millikan 1908-1917
Discovered charge and mass of electrons. -
Bohr
Believed that all electrons in atoms are in orbit, that electrons are on fixed points. -
Francis Aston
Discovered isotopes. -
Schrodinger
Discovered how to find an electron in a certain models. -
James Chadwick
Dicovered the exsitance of the neutrons.