-
300
Aristotle BC
Proided the method of scientific facts that provided the basic of scientific work.
Believed in the atomic fire ball.
Influenced by Plato.
Thought different elements are made of different amounts of earth, wind, fire, and air.
Physics was developed by him. -
460
Democritus BC
Changed theory of atoms because aristotle thought it wqas worthless.
Greek philosopher and student of Aristotle.
Thought atoms to be tiny particles.
Believed atoms were uncuttable.
Thought that iron atoms had hooks and salt atoms had spikes on them. -
Dalton
Provided experiments with lots of chemicals that showed that the matter did seem to sonsist of lumpy particles.
Believed that matter consists of invisible atoms.
Atoms arrange in fiffrent combinations to make different combinations to make different compounds.
English chemithist, meteorologist, and physicist. -
Joseph J.Thompson
Thought electrons were smaller than atoms.
Atoms consists of a large sphere of uniform positively chared embeded with smaller negatively charged particles.
He did the Plum Pudding Experiment.
Was a British philosipher. -
Ernest Rutherford
Atoms have a nucleous.
Did test on Thompson's mocel and dizcovered that the path curved that meant threr was something witha positive charge.
British physicist who became known as the father of nuclear physicist. -
Niels Bohr
Electrons were verifying energy and the jdiameter of the energy was consisted.
Discovered from Rutherford's theory had the hydrogen atoms electrons and diameter were expanded on his theory.
Danish physicist and made foundatioal contributions to understanding the atomic structure and the quantum theory. -
Heisenberg and Schrodinger
Heisenberg was an german physicist.
Schrodinger was a austrian physicist.
They believed that electrons were like flies.
Didnot believe tha elecrons orbited in a complete circle.
