The model of Aristotle 
Lavoisier's law of conservation of mass
Lavoisier's law of conservation of mass (presentation) 
The work of Lavoisier
Proust's law of constant proportions
Proust's law of constant proportions (presentation)
Proust's law of constant proportions (video)
Proust's law of constant proportions (exercise)
Dalton's law of multiple proportions
The atomic model of Dalton
Atomic interpretation of a chemical reaction
Models of molecules
The molecular model and the physical properties of matter
The lattices