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The alchemists created a scientific process which turned into atomic theory. They have credit for discovering the atom -
Plato created atomic theory. The theory that everything is made up of one of five solid shapes. -
Democritus was the first person to come up with the idea that all matter is made of atoms -
Robert Boyle created Boyles law. The law is the idea that decreasing volume will increase speed and pressure. -
Antone Lavoisier discovered that Oxygen was a key component in combustion. -
An atomic model proposed by Dalton. Dalton imagined atoms to be solid and spherical so he represented them with billiard balls. -
Dalton made the theory that atoms were solid spheres and that the came together to build things. (the billiard ball model) -
Avogadro was the first person to discover atoms could be in the form of molecules. He also discovered that equal volume regardless of the gas would have an equal number of molecules. -
Mendeleev was the first person to design the periodic table of elements. -
Thompson discovered electrons and proved that cathode rays had negatively charged particles. (Plum Pudding model) -
The Curies worked together and discovered two new atoms, radium and polonium. -
An atomic model proposed by J.J. Thomson. The model showed negatively charged atoms placed into a positively charged "dough". -
Einstein confirmed atomic theory by proving it mathematically. -
Millikan discovered the charge and mass of electrons by using an oil drop. -
Rutherford created the idea that an atom has a positively charged nucleus with electrons floating around it. -
An atomic model proposed by Bohr. The model shows a nucleus with electrons orbiting it, similar to our solar system. -
Bohr discovered that electrons float around in a spherical orbit around the nucleus of an atom. (Solar system model) -
Mosely discovered atomic numbers by using X-rays. Atomic numbers were added to the periodic table. -
Heisenberg made the theory of quantum mechanics and his uncertainty principle. -
An atomic model proposed by Erwin Schrodinger. This model showed a nucleus with many electrons orbiting in various levels that made it look like a cloud. -
Schrodinger made a more advanced model of the atom by using mathematical equations. This model is known as the Electron Cloud model. -
Chadwich discovered neutrons by using alpha particles. He named them neutrons because they had no charge.