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Atoms are "uncuttable."
Atoms are small, hard particles.
Atoms constantly move. -
The atom model
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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.
He conducted experiments in combining elements. -
The atom model
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He conducted the cathode-ray tube experiment.
His theory of the atomic structure lead to the "plum-pudding" model.
There are small, negatively charged atoms inside an atom. -
The atom model
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Atoms contain mostly empty space.
Electrons move in empty space in the atom.
He conducted the gold foil experiment.
Most of an atom's mass is in the nucleus.
There is a small, dense, positively charged nucleus. -
The atomic model
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Electrons jump between levels from path to path.
Electrons travel in definite paths. -
The atom model
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Electron paths cannot be predicted.
Electrons are found in electron clouds, not paths. -
The atom model.
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