S3.1 Periodic table (2) - periodicity & trends
This section on the periodic table focuses on periodicity, i.e. the repeating trends in the properties of elements and their compounds across a period. This is exemplified by atomic radius, ionic radius, ionization energy, electron affinity and electronegativity and the trend from basic metal oxides through amphoteric to acidic non-metal oxides. Groups 1 and 17 are used as examples to show the trends that occur down...