一、设计思路通过以第三周期元素 Na、Mg、Al 为例探究同周期元素金属性递变规律。在探究过程中,培养学生熟悉探究过程,掌握探究学习的流程,促进学生主动学习,从而帮助学生形成终身学习的能力。教学思路:(见附图) First, the design ideas By the third cycle of elements Na, Mg, Al as an example to explore the same period of the elemental rules of the metal. In the process of inquiry, students should be familiar with the process of inquiry, to master the process of inquiry learning and to promote students’ active learning so as to help students to form lifelong learning ability. Teaching ideas: (see photo)