Atoms are "uncuttable."
atoms are small, hard particles
He conducted experiments in combining elements.
Atoms are made of a single material formed into different shapes and sizes.
All substances are made of atoms.
Atoms of the same element are exactly alike.
Atoms of different elements are different.
He wanted to know why elements combine in specific proportions.
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.
He conducted the cathode-ray tube experiment.
There are small, negatively charged particles inside an atom.
His theory of atomic structure led to the "plum-pudding" model.
There is a small, dense, positively charged nucleus.
He conducted the gold foil experiment.
Most of an atom's mass is in the nucleus.
Atoms contain mostly empty space.
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.
Electron paths cannot be predicted.
Electrons are found in electron clouds, not path.