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甲、板书提纲(即讲解时需要写在黑板上的提纲)一、周期表的组织和排列:1.七个周期十个列{偶数列——每大周期的第一列奇数列——每大周期的第二列2.九个纵行,称为类,Ⅰ至Ⅷ类每类分两族:主族——包括小周期元素的族。副族——不包括小周期元素的族。二、由周期表认识元素性质变化。1.每列自左至右,金属性逐渐减弱。
A, blackboard outline (that need to be written on the blackboard on the outline) First, the organization and arrangement of the periodic table: 1. Seven cycles ten columns {even numbered columns - each column of the first cycle of odd columns - each The second column of the large cycle 2. Nine longitudinal lines, known as the class, Ⅰ to Ⅷ Each class is divided into two groups: the main group - including the family of small periodic elements. Subgroups - Families that do not include small periodic elements. Second, changes in the nature of the element from the periodic table. 1. Each column from left to right, the metal gradually weakened.