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Isaac Newton
Newton proposed a mechanical universe with small solid masses in motion -
John Dalton
Proposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass. -
Michael Faraday
Studied the effect of electricity on solutions, coined term "electrolysis" as a splitting of molecules with electricity, developed laws of electrolysis. Faraday himself was not a proponent of atomism. -
J. Plucker
Built one of the first gas discharge tubes ("cathode ray tube"). -
James Clerk Maxwell
Proposed electric and magnetic fields filled the void. -
Aston
Dscovered isotope -
Neils Bohr
Developed an explanation of atomic structure that underlies regularities of the periodic table of elements. His atomic model had atoms built up of sucessive orbital shells of electrons.