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atomic theory timeline
4 months ago
Democritus Democritus was one of the first Greek scientists to theorize that matter was made of small indivisible particles.
John Dalton John Dalton was the first scientist the proposed the atom with ways the atom worked
Micheal Faraday Micheal Faraday theorized that the atom contained an electrical component that also was responsible for the joining of compounds
Marie and Pierre Curie Marie and Pierre Curie had discovered radiation by placing uranium salt on a photographic plate wrapped in black paper
J. J. Thomson J. J. Thomson discovered that the atom contained a positive and negative charge by experimenting with a Crookes tube
Ernest Rutherford Ernest Rutherford found out by aiming alpha particles at a sheet of gold foil that the atom was composed of a small, dense, positively charged nucleus surrounded by a cloud of negatively charged electrons
Erwin Schrodinger Erwin Schrodinger had used mathematical equations to find the probability of an electron being in any one place around the nucleus and had made an electron density map
Neils Bohr Neils Bohr had proposed that the electrons have a concentric circular orbit around the nucleus
James Chadwick James Chadwick had by bombarding beryllium with alpha particles that a unknown radiation was being emitted and that it was coming from a neutrally charged particle which was named the neutron
Robert Millikan Robert Millikan discovered the charge of an electron by dropping oil between electrodes
Joseph Luis Proust Joseph Luis Proust proposed that all compounds were the same proportions of mass as the combined elements despite how they were made
Antoine Lavoisier Antoine Lavoisier had discovered that mass was conserved in a chemical reaction and that the total mass of the product was the always the same as the total mass of the starting materials
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