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高中化学物质性质实验中的策略性知识初探
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作者 吴文蕾 《现代基础教育研究》 2015年第2期188-191,共4页
高中化学物质性质实验是学习化学基本概念和掌握化学基本理论的根本手段,亦是化学知识的重要组成部分。实验中包含各种策略性知识,能否充分发挥它们的作用直接关系到化学基础知识教学的质量及成效,也关系到学生学习的有效性和持续性。... 高中化学物质性质实验是学习化学基本概念和掌握化学基本理论的根本手段,亦是化学知识的重要组成部分。实验中包含各种策略性知识,能否充分发挥它们的作用直接关系到化学基础知识教学的质量及成效,也关系到学生学习的有效性和持续性。文章从策略性知识的概念出发,对高中化学物质性质实验中的策略性知识进行了初步研究,以期促进策略性知识的显性化。 展开更多
关键词 高中化学 物质性质实验 策略性知识
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如何在化学实验中进行观察
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作者 赵长宏 《北京教育(普教版)》 2018年第1期89-89,共1页
以实验为基础是化学学科的重要特征之一。而实验活动的第一个特点就是有目的的观察。培养学生的观察能力不仅仅是化学学科的教学要求,更能影响学生科学素养的构建和发展。中学化学实验观察的内容有:实验现象、直观形象和自然现象。
关键词 中学化学实验 实验活动 顺序观察 实验 物质性质 物理性质 微型实验 探究性实验 探索性实验 离子反应
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The codes of matter and their applications
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作者 Xiao-Lin Wang 《Science Bulletin》 SCIE EI CAS CSCD 2015年第19期1661-1673,共13页
The elements in the periodic table are the building blocks used to form substances with different compositions. Nevertheless, it is the properties of substances that are decisive for their existence and practical appl... The elements in the periodic table are the building blocks used to form substances with different compositions. Nevertheless, it is the properties of substances that are decisive for their existence and practical applications. Searching for new class of materials with exotic properties has always been challenging because of the complexity of both the theoretical and the experimental approaches developed so far. Here, we propose that the three ubiquitous and paramount attributes of all existing matter charge(Q), spin(S) or rotational motion, and linear motion(K) can be used to account for the formation of different types of matter/materials and their properties that have been or will be known to us. The three attributes or original codes can produce six primary codes which can further produce another sixty codes. The physical meanings represented by each code are unlocked. The table consisting of the 60 codes is introduced as the table of properties of codes of matter. We demonstrate that these codes can be used as building blocks to form new properties and new materials. Many new types of quasiparticles and new classes of materials with exotic properties of Q, S and K are predicted. Their possible experimental realizations are proposed. The possible applications of the codes of matter in other fields such as elementary particles, photonics and chemistry are briefly discussed. We know that there should be more new materials and new electronic, spin and photonic states to be discovered, but we do not know what they are. The codes of matter clearly reveal to us how many and what they are and how easily we can recognize what they are. Experimental and theoretical exploration for new forms of matter, new quasiparticles, or new electronic and spin states, or new states of photon or properties of light, as well as macroscopic entities with exotic properties represented by the codes of matter, is imminent. 展开更多
关键词 New materials New electronic state New method Materials design
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