What you’ll learn10 learning objectivesChoose one objective for a focused lesson, or study the complete topic.3.1.1Organization• Periods, groups, blocks• Metals, metalloids, non-metals• Recognize s, p, d, and f blocksSyllabus objective3.1.2Electron configuration and position• 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 versaSyllabus objective3.1.3Periodicity• Trends: atomic radius, ionic radius, IE, electron affinity, electronegativity• Explain trends across periods and down groupsSyllabus objective3.1.4Group trends• 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 trendsSyllabus objective3.1.5Metal/non-metal continuum• Oxides: basic (metal) → amphoteric → acidic (non-metal)• Oxide reactions with water• Deduce equations for oxides of group 1, group 2, carbon, and sulfur with waterSyllabus objective3.1.6Oxidation states• Number of electrons transferred in bonding• Charge if compound were ionic• Deduce oxidation states in compounds and ionsSyllabus objective3.1.7(HL)—IE discontinuities• Evidence for energy sublevels• Explain discontinuities using energy sublevels and electron pairingSyllabus objective3.1.8(HL)—Transition element properties• Incomplete d-sublevels• Variable oxidation states, high melting points, magnetic properties• Catalytic properties, colored compounds, complex ions with ligands• Recognize ligands and complex ions as characteristic transition element chemistrySyllabus objective3.1.9(HL)—Variable oxidation states• Successive IE values close together• Deduce electron configurations of first-row transition element ionsSyllabus objective3.1.10(HL)—Transition element colors• Light absorption promotes electron between split d-orbitals• Complementary colors (use color wheel)• Use the color wheel to link absorbed and observed colorsSyllabus objective