Scientists

Scientists

Period: 200 to Jan 1, 2000

Democritus

460

google.co,Democrtius was a greek scientist who was the first to develop the idea of an atom and construct a model of it. He believed that it was the simplest form of matter.

Antoine Lavoisier

Jan 1, 1768

google.comAntoine conducted the burning log experiment. He concluded that elements can not be broken down, He also discovered that they react with each other. Lavoisier created the law of conservation.

Joseph Proust

Jan 1, 1794

google.comJoseph Proust conducted the Copper and Oxygen experiment. His largest accomplishment in the world of science was disproving Berthollet with the law of definite proportions. Proust also discovered Glucose, Overall he discovered three types of sugars.

John Dalton

Jan 1, 1803

google.comJohn Dalton created the four postulates. He concluded that matter is made up of small particles. He also discovered that there are three forms of atoms; simple, compound, and complex. He is known for the Atomic theory, the Law of multiple proportions, Dalton's law of Partial pressures, and Daltonism.

J.J. Thomson

Jan 1, 1897

google.comThomson conducted the cathode ray experiment. He discovered Electrons, and developed a model called the plum pudding model.He was known for many things in science such as the discovery of the isotope along with the electron, the mass spectrometer invention, the first m/e measurement, and many more.

Robert Millikan

Jan 1, 1909

google.comRobert Millikan conducted the oil drop experiment and discovered the mass and voltage of the electron. He is known for the cahrge of the electron and advanced cosmic-ray physics.

Ernest Rutherford

Jan 1, 1909

google.comErnest Rutherford conducted the gold foil experiment, with this he discovered that there is a nucleus within the atom. His first researches were concerned with the magnetic properties of iron when esposed to high frequency oscillations. He was one of the firsts to design highly original experiments with high frequency, alternating currents.

Niels Bohr

Jan 1, 1911

google.comBohr conducted the spectro light of atoms experiment. It states that the atom is one, one ten thousandths of what other scientists predicted it to be. He is known for the copenhagen interpretation, the Bohr model, the Bohr-Einsteain debates, and the Bohr magneton.

Aristotle

Mar 2, 2022

google.comAristotle was a greek philosopher. He didn't believe in Democritus' theory of the atom. He instead believed that there is no smallest part of matter, but instead the substances were made up of the four elements; ( Air, Fire, Earth, Water) In the end Aristotle's idea prevailed because more people believed in his reasoning.