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| Universe is made up of invisible units called atoms |
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| All atoms of a given element are alike and different elements make a compound |
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| Hizenbourg in 1925 or 26 says that you can find the speed or location but not both |
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1913
Nucleas in center and electrons orbit.
Each electron has specific energy
(target) |
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Nucleus in the middle with electrons swarming it
Farther from the nucleas higher the energy level
All atoms have at least 1 valence electron |
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Made the periodic table that was by atomic mass
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| Most mass of an atom is in its center and he made the gold foil experiment |
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Discovery of electrons
Made the model of pudding/blueberry muffins |
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