3.1 The periodic table

• Periods, groups, blocks • Metals, metalloids, non-metals • Recognize s, p, d, and f blocks

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• Period number = outer energy level • Group = number of valence electrons • Electron configuration ↔ position (up to Z=36) • Deduce element position from electron configuration and vice versa

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• Trends: atomic radius, ionic radius, IE, electron affinity, electronegativity • Explain trends across periods and down groups

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• Group 1: increasing metallic character • Group 17: decreasing non-metallic character • Reactions: Group 1 metals with water, Group 17 with halide ions • Describe and explain displacement reactions using periodic trends

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• Oxides: basic (metal) → amphoteric → acidic (non-metal) • Oxide reactions with water • Deduce equations for oxides of group 1, group 2, carbon, and sulfur with water

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• Number of electrons transferred in bonding • Charge if compound were ionic • Deduce oxidation states in compounds and ions

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