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406 BCE
Democratius
He thought that there were very tiny particles that were uncut-able. -
Dalton
Thought that all atoms were very small round objects. -
Crookes
Used a cathode ray to find if atoms were positive or negitave -
Becquerel
He believed that all atoms had an electron cloud -
Thomson
he associated atoms with the form of stoichiometry. -
Rutherford
hypothesized that atoms had a very small nucleus. -
Bohr
That atoms were a very tiny substance that had a heavy nucleus and a light electron cloud. -
Chadwick model
That all atoms had a special electron “Cloud” around the nucleus -
Electron model
the electron cloud model
