He conducted experiments in combining elements.
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 of atoms.
He wanted to know why elements combine in specific proportions.
Atoms of the same element are exactly alike.
Atoms of different elements are different.
He developed the law of electrolysis.
He built one of the first gas discharge tubes (cathode ray tube).
His model had electrons surrounding the nucleus at a distance.
His theory of atomic structure led to the "plum-pudding" model.
He conducted the cathode-ray tube experiment.
There are small, negatively charged particles inside an atom.
He conducted the gold foil experiment.
Atoms contain mostly empty space.
There is a small, dense, positively charged nucleus.
Most of an atom's mass is in the nucleus.
Electrons travel in certain paths or energy levels.
Electrons can jump from a path in one level to a path in another level.
He discovered another particle in the nucleus of atoms.
He discovered the neutral Neutron.
Electrons are found in electron clouds, not path.
Electron paths cannot be predicted.