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SNC1Deh1

History of Matter

QuestionAnswer
Aristotle Discovered 4 elements (Earth, Wind, Fire, Water)
Alchemists Chemists who were trying to make gold
Lavoisier Discovered 23 new elements and says particles cannot be broken apart
John Dalton Quaker who created Atomic Theory
J.J. Thompson Discovered the electron (negative charge) using Cathode Ray Tube experiment. Created Plum Pudding Model to describe the atom.
Rutherford Discovered atoms have a nucleus using the Gold Foil Experiment
Chadwick Discovered that the nucleus has protons and neutrons
Bohr Discovered that electrons are found on rings/orbitals on the outside of the atom
Created by: NCCgradenines
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