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Atoms are "uncuttable."
Atoms are small hard particles.
Atoms are made of a single material formed into different shapes and sizes. -
All substances are made from atoms.
Atoms of different elements are different.
Atoms of the same element are exactly alike.
He conducted experiments in combining elements.
He wanted to know why elements combine in specific proportions. -
There are small negatively charged particles inside the atom.
His theory of atomic structure led to the plum pudding model.
He did the cathode ray tube experiment. -
Most of an atom's mass is in the nucleus.
Gold foil experiment.
There is a small dense positively charged nucleus.
Atoms contain mostly empty space.
His model had electrons surrounding the nucleus at a distance. -
Electrons travel in certain paths, or energy levels.
Electrons can jump from a path in one level to a path in another level. -
Electron paths can't be predicted.
Electrons are found in clouds and not paths. -
Discovered the neutral Nuetron
