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19 Cards in this Set

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Electrons move in empty space in the atom.
Rutherford
Conducted the gold-foil experiment.
Rutherford
Electrons travel in definite paths.
Bohr
Atoms contain mostly empty space.
Rutherford
Most of an atom's mass is in it's nucleus.
Rutherford
Electrons jump between levels fro path to path.
Bohr
Conducted experiments in combining elements.
Dalton
Electron paths cannot be predicted.
Modern/Schrodinger and Heisenberg
Elements combine in specific proportions.
Dalton
There are small, negatively charged particles inside an atom.
Thomson
His theory led to the "plum pudding" model.
Thomson
All substances are made of atoms.
Dalton
Atoms are small, hard particles
Democritus
Atoms of the same element are exactly alike.
Dalton
There is a small, dense, positively charged nucleus.
Rutherford.
Atoms are "uncuttable"
Democritus
Conducted the cathode-ray tube experiment.
Thomson
Atoms of different elements are different.
Dalton
Atoms constantly move
Democritus