3.1 The periodic table
3.1.2—Electron configuration and position
3.1.3—Periodicity
3.1.4—Group trends
3.1.5—Metal/non-metal continuum
3.1.6—Oxidation states
3.1.7 (HL)—IE discontinuities
3.1.8 (HL)—Transition element properties
3.1.9 (HL)—Variable oxidation states
3.1.10 (HL)—Transition element colors
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