The Development of a Modern Theory of the Atom Aristotle Democritus.
The Periodic Classification of the Elements. A partial chart of chemical symbols in use about 1780.
LecturePLUS Timberlake1 The Atom Atomic Number and Mass Number Isotopes (Take out your Periodic Tables)
LecturePLUS Timberlake1 Atoms and Elements The Atom Atomic Number and Mass Number Isotopes.
Chapter #3 Atoms: The Building Blocks of Matter Chapter #3 ATOMS: The Building Blocks of Matter.
Chapter 4 Atoms
