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Atomic Innovators

Way Old Men and their theories about atomic structure

1st to propose that matter is not infinitely divisible and limit = atomos Democritus
Says matter is empty space through which atomos move Democritus
Believed matter was infinitely divisible (disagreed with Democritus) Aristotle
Believed all matter was fire, earth, air, and water. Aristotle
Believed all atoms of a given element are identical and are different from atoms of other elements John Dalton
Said atoms cannot be created, destroyed, or divided into smaller particles John Dalton
Said that atoms combine in simple whole number compound rations to make compounds John Dalton
Said that in a chemical reaction, atoms are spearated, combined, or rearranged John Dalton
Discovered 1st subatomic particle, electron, with CRT J.J. Thompson
Proposed Plum Pudding model to explain the neturality of an atom J.J. Thompson
Inadvertently disprove plum pudding model by firing alpha particles at gold foil, resulting in deflection of alpha particles Ernest Rutherford
Proposed that the atom had a tiny, dense central portion and that the elctrons move through empty space around the nucleus; later states that protons are in the nucleus. Ernest Rutherford
Proposed that the nucleus had another particle in it with a mass near that of the proton but with no charge James Chadwick
Proposed a quantum model of the atom in which the electrons followed distinct orbits around the nucleus Niels Bohr
Proposed that the electrons traveled in wave-like orbits (known as Quantum Mechanical Model) Louis de Broglie
Created by: cablecars513