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Dalton
Published his atomic theory which states that all matter is composed of atoms, all atoms of a given element are identical, compounds are formed by a combination of different types of atoms, and that a chemical reaction is a rearrangement of atoms. -
Joseph Louis Gay-Lussac
Discovered that water was made up of two parts hydrogen and one part oxygen. -
Periodic Table of Elements
Dmitri Mendeleev arranged all the elements into the periodic table while creating his own chemistry text book. -
Thomson
Discovered the electron using a cathode ray tube. Believed that an atom was a sphere with positive material with negatively charged electrons stuck in it. -
Marie Curie
Discoverd radium and polonium along with Pierre Curie. Won two nobel prizes for chemistry and physics. -
Rutherford
Shot alpha particles through peices of gold tin. Believed that the atom was mostly empty space with a dense positively charged nucleus surrounded by negatively charged electrons moving at a rapid pase. -
Antonius Van den Broek
Proposed that elements were more properly organized by positive nuclear charge than weight. -
Bohr
Believed the atom had a positively charged nucleus and was surrounded by electrons that travel in a circular orbit. -
Frederick Soddy
Won the nobel prize for his theory of Isotopes and further knowledge of radioactivity.
