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.
He wanted to know why elements combine in specific proportion.
Atoms of different elements are different.
All substances are made of atoms.
Atoms of the same element are exactly alike.
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.
Atoms contain mostly empty space
He conducted the gold foil experiment.
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.