21.2 The compounds of chromium 21.1 The elemental substances of Cr, Mo and W 21.3 The elemental substance of Mn 21.4 The compounds of manganese

§19.1 The elements of copper family §19.2 The elements of zinc family

18.1 The discovery of the rare gases 18.4 The rare gas compounds 18.3 The existence and recovery of the rare gases 18.2 Properties and uses of the rare gases 18.5 Summarry on the main group elements

17.5 halogen oxyacids 17.4 Halides and Polyhalides 17.3 Hydrogen halides 17.2 The elemental substances 17.1 The halogens

16.3 Sulfur and the related compounds 16.2 Oxygen and the related 16.1 Outline on oxygen family

15.5 The compounds of As, Sb and Bi 15.4 The compounds of phosphorus 15.3 The compounds of nitrogen 15.2 The elemental substances of nitrogen family 15.1 Outline on nitrogen family

14.5 The compounds of tin and lead 14.4 The compounds of silicon 14.3 The compounds of carbon 14.2 The elemental substances of carbon family 14.1 Outline on carbon family

13.1 Outline on boron family 13.3 The compounds of boron 13.2 The elemental substances of boron family *13.4 The compounds of aluminum

§12.1 The elementary substances §12.3 The particularity of Li and Be The diagonal relationship §12.2 The properties of the alkali and alkaline earth compounds

§11.2 The valence bond theory of coordination compounds §11.3 Crystal Field Theoryof coordination compound §11.1 Basic concepts of coordination compounds §*11.5 Further discussion on coordination §11.4 Stability of coordination compounds