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400
democritus 400bc
He discovered that it was the smallest particle of matter. Based his theory on observations and natural curiosity. It looked like a plain circle. -
Dalton 1803
He developed the 1st useful atomic theory of matter. he performed a serious of experiments on mixtures of gases to determine what effects properties of the indivisual gases had on the properties of the mixtures a whole. It looks like a billard ball. -
Thomson 1895
The particles in cathode. He built a cathode-ray tube in which the rays passed through. He believed they were really tiny particles. -
Rutherford
He broke up the nucleus of an atom and is now called ''father of science.'' He made a model then he did it to a real atom. He said it look like a solar system. -
Bohr 1912
The change of the orbit electron. His method was called the quantum theory. His model was called the Rutherford model. -
Schrodinger 1925
He developed questions known as schrodinger equation. He contributed to atomic theory. He based it on Louis v de broglie ideas. He thought it looked waves