TIGER

3.1 A Walk on the Beach
3.2 Protons Determine the Element
3.3 Electrons
3.4 Neutrons
3.5 Specifying an Atom
3.6 Atomic Mass
3.7 Periodic Law
3.8 A Theory That Explains the Periodic Law: The Bohr Model
3.9 The Quantum Mechanical Model for the Atom
3.10 Families of Elements
3.11 A Dozen Nails and a Mole of Atoms