Atomic Theory
Category: Other
Updated: 28 Sep 2018
By Emma Larsen and Lydia Leith
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Created byEmma Larsen
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Events
Democritus discovered that everything is
composed of indestructible, physically
indivisible, and always moving atoms.Neils Bohr discovered that electrons are
arranged in concentric circular orbits
around the nucleus.James Chadwick discovered the neutron.John Dalton invented the Solid Sphere Model.J.J. Thomson created the Plum Pudding Model.Ernest Rutherford came up with the Nuclear Model.Neils Bohr created the Planetary Model of the atom.Erwin Schrodinger invented the Quantum Model of the atom.Joseph Proust discovered that a compound is
composed of exact proportions of elements by
mass regardless of how the compound was created.Marie and Pierre Curie discovered that thorium
also emitted radiation depended upon the
element present in the compound.Lavoiser found that mass is conserved in a
chemical reaction, but the amount of hydrogen
and oxygen atoms before and after the reaction
is the same.Periods
Robert Millikan experimented with the charge of electrons to prove Thomson's theory right.Michael Faraday discovered that electrical forces were responsible for the joining of atoms in compounds.
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