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Antoine Lavoisier
Antoine Lavoisier established the law of conservation of matter which stated that matter, like energy, is neither created or destroyed in a chemical process. -
Joseph Louis Proust
Joseph Louis Proust established the law of constant compositon which stated that a given compound always contains the same elements in the same proportions by mass. -
John Dalton
John Dalton developed the first atomic theory. -
Michael Faraday
Michael Faraday was the first man to state that atoms contain particles that have an electrical charge. -
Henri Becquerel
Henri Becquerel discovered that Uranium exhibits radioactivity. -
Joseph John Thomson
Joseph John Thomson discovered the electron and the charge of an electron per unit of mass. -
Marie Curie
Marie Curie and her husband created a new element called Polonium. On December 28 of that same year her and her husband also announced the existence of a second element which they named Radium. -
Earnest Rutherford
Earnest Rutherford discovered the nucleus of an atom by accident while performing his "Gold Foil Experiment." -
Robert Andrews Millikan
Robert Andrewa Millikan discovered the charge and mass of an electron during his infamous "Oil Drop Experiment."