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1、第一节 元素周期表,第1课时 说课稿,一、教材分析,教材地位和作用,教学目标,教学重、难点,4,1,2,3,1.教材地位和作用,元素周期表是人教版教材高一化学必修2第一章第一节内容。本章以元素周期表和元素周期律为框架，先介绍元素周期表，再通过一些事实和实验归纳元素周期律。本节从化学史引入，直接呈现元素周期表的结构。在学生了解一些元素性质和原子结构示意图的基础上，以周期表的纵向结构为线索，以碱金属和卤族元素为代表，通过比较原子结构(电子层数，最外层电子数)的异同，突出最外层电子数的相同并通过实验和事实来呈现同主族元素性质的相似性和递变性。帮助学生认识元素性质与原子核外电子的关系。在此基础上，提出
2、元素性质与原子核的关系，并由此引出核素和同位素的有关知识。根据本教材的结构和内容分析，根据新课标，本节内容要求达到“能结合有关数据和实验事实认识元素周期律，了解原子结构与元素性质的关系；能描述元素周期表的结构，知道金属、非金属在元素周期表中的位置及其性质的递变规律”。结合新课标和学生实际，确定以下三维目标：,2.教学目标,能描述元素周期表的结构，知道金属、非金属在元素周期表中的位置。在初中有关原子结构知识的基础上，了解元素原子核外电子排布。通过有关数据和实验事实，了解原子结构与元素性质之间的关系。认识原子结构相似的一族元素在化学性质上表现出的相似性和递变性。,通过查找元素周期表发现史，学会运用
3、查阅资料获取信息。形成通过分析和处理数据得出结论，形成概念，发现规律的思维方法。通过交流讨论，养成学生敢于质疑、合作解决问题的意识。情感态度与价值观,培养学习化学的兴趣，乐于探究物质变化的奥秘，体验科学探究的艰辛和喜悦，感受化学世界的奇妙与和谐。通过化学史的学习，培养勇于创新、不断探索的科学品质。通过多种交流和探究活动，在活动中养成严谨求实的科学态度。,知识与技能,过程与方法,情感态度与价值观,3.教学重、难点,Text in here,Text in here,Contents,元素在元素周期表中的位置及其性质的递变规律,元素性质和原子结构的关系,元素周期表是元素周期律的具体表现形式，是学习
4、化学的重要工具。元素周期表在初中化学中已有简单介绍，学生已经知道了元素周期表的大体结构，并会用元素周期表查找常见元素的相关知识，但对元素与原子结构的关系还没有更深的理解。因此，本节教学的主要目的在于帮助学生能够从原子结构的角度进一步认识元素周期表的实质，为学习元素周期律打下基础。综合上述原因，本节的重难点设置如下：,元素周期表的结构,教学重点,元素在元素周期表中的位置及其性质的递变规律。,教学难点,二、学情分析,学生在初三对原子结构和元素周期表都有初步了解，但在学习中较多是用机械记忆的方法，对知识的理解不够深刻，易遗忘，解决实际问题的能力较低。这一节课是新学期的第一堂化学课，同时这部分内容又比
5、较枯燥，如何激发学生的学习兴趣，如何引导学生从方法的高度来重新审视这一内容应成为教学设计的关键。,1、教学策略、方法,课程改革的重点之一是实施以培养创新精神和实践能力为重点的素质教育，促进教师的教学方式和学生学习方式的变革，倡导学生自主学习、合作学习、探究学习。教学活动是教与学的双边活动，必须充分发挥学生的主体作用和教师的主导作用，使之相互促进，协调发展。根据课程改革的要求、教育原理和我校学生的实际情况，我采用了如下教学方法：创设情景、引入课题。分析图表、巧得规律。精心设疑、实验探究。,Click to edit title style,Description of the contents,
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