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所在平台: Udemy |
课程主页: https://www.udemy.com/course/metals-and-non-metals/
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**Coursera 课程：金属与非金属 课程概述** 本课程深入探讨金属与非金属的提取、物理化学性质以及相关应用。 **课程重点：** * **元素的普遍存在：** 大部分金属由于其高活性，易与湿气、二氧化碳、氧气、硫、卤素等物质反应，因此以化合态（矿物）存在于地壳中。 * **地球的资源宝库：** 地球是我们赖以生存的家园，不仅提供煤炭、石油、石墨、钻石等矿物，也蕴藏着大量金属和非金属元素。我们日常生活中接触到的汽油、煤油、蜡、煤气以及各种矿石和岩石，都由多种非金属元素构成。 * **元素的分类：** 目前已知的119种元素中，约80%是金属，其余为非金属。根据其性质，所有元素被划分为两大类：金属和非金属。 * **元素在周期表中的位置：** 在周期表中，位于左侧（氢除外）和中心的元素通常是金属，例如钠、钾、镁、钙、铁、铜、锌等。 **课程目标：** 通过本课程的学习，您将能够： * 理解金属和非金属的来源与存在形式。 * 掌握金属和非金属的物理和化学特性。 * 了解金属和非金属在日常生活和工业中的各种用途。 * 认识金属和非金属在元素周期表中的分布规律。
This Course deals with the Extraction of Metals and Non Metals, Physical and Chemical Properties of Metals and Non Metals and Uses of Metals and Non Metals.The elements which are quite reactive and have a tendency to react with moisture, carbon dioxide, oxygen, sulphur, halogens, etc., are found in combined state. Most of the metals are found in the combined state as minerals.All the materials around us are made up of chemical elements, which are found in the earth's crust. Earth is the source of coal, petroleum, graphite, diamond and many other minerals of metals and non-metals. We get various useful things like gasoline, kerosene, wax, coal gas, minerals and rocks in the natural resource, which are made up of many non-metals. These elements occur as minerals and rocks in the earth's crust. Some of these elements like oxygen, nitrogen and carbon dioxide occur in atmospheric air.There are more than 119 element known at present 80% of these elements are metals and rest are non - metals. On the basis of their characteristic properties, all of these elements are divided into two main groups: metals and non-metals.POSITION OF METALS AND NON-METALS IN THE PERIODIC TABLEThe elements which are placed on the left hand side (except hydrogen) and in the center of the periodic table are called metals. Such as sodium, potassium, magnesium, calcium, iron, copper, zinc etc.
