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Discovered:
- Atoms are "uncuttable."
-Atoms are small, hard particles.
- Atoms constantly move. -
Created the Atomic Model
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-Conducted experiments in combining elements Discovered:
-All substances are made of atoms
-Atoms of different elements are different
-Atoms of the same element are exactly alike.
-Elements combine in specific proportions -
Created the Billiard Ball Model
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-Discovered that there are small, negatively charged particles inside an atom. -He conducted the cathode-ray tube experiment
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His theory of the atomic structure lead to the "plum-pudding" model.
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Discovered:
-Atoms contain mostly empty space
-Electrons move in empty space in the atom
-Most of an atom's mass is in the nucleus
-There's a small, dense, positively charged nucleus -He conducted the gold foil experiment -
Created the Model Of An Atom
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Discovered:
-Electrons jump between levels from path to path.
-Electrons travel in definite paths -
Created the Bohr Model
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Discovered:
-Electron paths cannot be predicted.
-Electrons are found in electron clouds, not paths. -
Created the Quantum Mechanical Model
