论中学生化学元素观的建构

化学元素观是中学化学学习中的核心观念。化学元素观的建构有利于中学生对物质世界形成有序的认识,有利于中学生形成化学的思维方法。化学元素观建构的基本策略是:(1)在元素概念基础上形成物质的基本分类;(2)在原子结构认识的基础上理解元素是如何形成物质的;(3)在元素周期律学习的基础上形成元素性质研究的基本模型;(4)在专题性学习中建构化学元素观;(5)在元素观指导下的应用性学习中丰富元素观;(6)利用概念图技术帮助化学元素观的建构。

Discussion on the Construction of Middle School Students' View of Chemical Element

Views of chemical element is one of core views in middle school chemistry study.Construction of view of chemical element may help middle school students to form orderly understanding of matter and thinking methods of chemistry.The basic strategies of constructing view of chemical element are(1)from the classification of matter based on element conceptions,(2)understand how the elements form matters based on understanding of atomic structure,(3)form the basic model for investigation of the properties of elements based on the study of element periodic law,(4)construct view of chemical element in special topic study,(5)enrich view of chemical element in application of it,(6)construct view of chemical element using concept maps.