18.5 Summarry on the main group elements *18.5.1 The general properties of the s-block elements 18.5.2 Outline on the p-block elements 18.5.3 The property variations for compounds of p-block elements
§ 18.5 Summarry on the main group elements *18.5.1 The general properties of the s-block elements 18.5.2 Outline on the p-block elements 18.5.3 The property variations for compounds of p-block elements
*18.5.1 The general properties of the s-block elements The alkali metals (IA):ns Li,Na,K,Rb,Cs,Fr The alkaline metals(IIA):ns2 Be,Mg,Ca,Sr,Ba,Ra They are all active metals D
*18.5.1 The general properties of the s-block elements The alkali metals (IA )：ns1 Li, Na, K, Rb, Cs, Fr The alkaline metals (IIA )：ns2 Be, Mg, Ca, Sr, Ba, Ra They are all active metals