TIGER

7.1 Building the Periodic Table
7.2 Metals, Non-Metals and Metalloids
7.3 Groups in the Periodic Table
7.4 The Concept of Periodicity
7.5 Atomic Size
7.6 Ionization Energies
7.7 Electron Affinity
7.8 Electronegativity
7.9 Reactivity
7.10 The Elements and the Environment