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110
Democritus
First atomic theory all things made of unbreakable particles if you keep breaking it down, obserrving the world around him bread, salt. round circles. -
111
Aristotle (400 B.C)
He used theories from the observation to figure that different things came from different amounts of nautral elements. -
113
Dalton (1808)
Dalton arranged atoms in different combiations ad foud that atoms are indivisible if you keep breaking them you will get and get and unbreakable particles. He thought they looked like tiny balls. -
114
Thomson 1904
He discover that atoms have electrons and that electrons are much smaller than atoms. The atoms looked like plum pubbing -
114
Rutherford (1911)
nuclear model gold expiriment.He said atoms had a nucleaus and -
115
Bohr (1913)
He said electrons orbit around nucleaus as planets do around the sun. he found this from his experiment. -
116
Heisenberg & Schrodinger (1920)
electrons do not move in orbit or cirles they move in waves around nucleas. He gathered evidence from his experiment.
