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367
Aristotle
He becomes a student at the Academy of Plato in Athens for 20 years and believes that matter can be broken into smaller pieces. -
400
Democritus' theory
He had a theory that natures basic particles were atoms. -
Dalton's Atomic Theory
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John Newlands Law of Octaves
Newlands published his "Law of Octaves" which states that "any given element will exhibit analogues behavior to the eighth element following it in the table." -
Mendeleev's Periodic table
Mendeleev's periodic table was published. -
Crooke
Crooke invents the Crooke's Tube. -
JJ Thomsons' demonstration
Thomson demonstrated that Hydrogen had only a single electron per atom. -
Bohr's Atomic Model
Bohr invents his Atomic Model of the atom. -
Ernest Rutherford "Split the nucleus"
Rutherford was widely credited with first splitting the atom and leading the first experiment to "split the nucleus". -
Chadwicks' discovery
He discovers the unknown particle in the atomic nucleus..the neutron.
