September 30, 2020
For educational institutions
Camila Aviles rodriguez
⟶ Updated 21 Oct 2018 ⟶
List of edits
Democritus: came up with the idea of the atomic theory of the universe
Ernest Rutherford: conducted the Gold Foil experiment
J.J. Thomson: discovered the electron
Antoine Lavoisier: came up with the Law of Conservation of Mass.
John Dalton: developed the law of multiple proportions about how elements combine.
Plum Pudding Atomic Model
Law of Conservation of Mass: By Lavoisier stating in a chemical reaction, matter is neither created nor destroyed.
Borh Planetary Model
Electron Cloud Model
Oil Drop Experiment: measured the electric charge, they observed tiny electrically charged droplets of oil
Gold Foil Experiment: by Rutherford, proved the existence of the nucleus.
Cathode Ray Tube Experiment: a vacuum with two electric plates that produced a positive anode and a negative cathode to deflect rays.
Dalton’s Atomic Theory: all matter is made of atoms that are indivisible and indestructible, all atoms of a given element are identical in mass and property, compounds are formed by the combination of two or more atoms of different kinds, and a chemical reaction is a rearrangement of atoms.
Erwin Schrodinger- came up with the Quantum Mechanical model of the atom; successfully predicted the location of electrons in atoms.
Niels Bohr: proposed the Bohr model of the atom, Also participated in the finding of the atomic bomb
Robert Millikan: measured the charge of electrons; he did this in the oil drop experiment.
James Chadwick: conducted an experiment bombarding Beryllium with alpha particles.
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