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Chem Quest 2

QuestionAnswer
Why was Democritus significant? Said that matter is made of small invisible particles that he called atomos or atoms.
Why was John Dalton significant? He wrote the first atomic theory and created the Billiard Ball Model.
Why was JJ Thomson significant? Created the Plum Pudding Model which was proved to be incorrect. Discovered the electron.
Why was Eugen Goldstein significant?
Why was Robert A Millikan significant?
Why was Ernest Rutherford significant?
Why was James Chadwick significant?
Why was Niels Bohr significant?
What is the difference between atomic mass and mass number?
Law of Conservation of Mass
Law of Multiple Proportions
Law of Definite Proportions
Dalton's Atomic Theory Postulates
Flaws of Dalton's AT
JJ Thomson Plum Pudding Model
Flaws of the Plum Pudding Model
Cathode Ray Tube Experiment significance
Oil Drop Experiment significance
Gold Foil Bombardment Experiment significance Proved that the Plum Pudding Model was incorrect; most of the alpha particles passed through the gold foil, proving that atoms are made of mostly empty space. Atoms ricocheted back because there is a small nucleus in the center of the atom.
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