metal definition

简明释义

金属层图像形成

英英释义

例句

1.The metal definition 金属的定义 includes characteristics such as conductivity and malleability.

metal definition 金属的定义包括导电性和延展性等特征。

2.During our lab experiment, we discussed the metal definition 金属的定义 of various alloys.

在我们的实验中，我们讨论了各种合金的metal definition 金属的定义。

3.Understanding the metal definition 金属的定义 is crucial for students studying material science.

理解metal definition 金属的定义对学习材料科学的学生来说至关重要。

4.In chemistry class, we learned the metal definition 金属的定义 of elements like iron and copper.

在化学课上，我们学习了像铁和铜这样的元素的metal definition 金属的定义。

5.The teacher provided a clear metal definition 金属的定义 to help us understand the properties of metals.

老师提供了一个清晰的metal definition 金属的定义，以帮助我们理解金属的特性。

作文

The term metal definition refers to the classification and characteristics of metals, which are a group of elements that are typically hard, shiny, malleable, and good conductors of heat and electricity. Metals are found on the left side and in the center of the periodic table, and they play a crucial role in various industries and everyday life. Understanding the metal definition is essential for students and professionals in fields such as chemistry, engineering, and materials science. Metals can be divided into several categories based on their properties. For instance, ferrous metals contain iron and are known for their strength and durability. Examples include steel and cast iron, which are widely used in construction and manufacturing. Non-ferrous metals, on the other hand, do not contain iron and are typically more resistant to corrosion. Aluminum, copper, and lead are common non-ferrous metals that find applications in electrical wiring, packaging, and plumbing, respectively. The metal definition also encompasses the physical properties that distinguish metals from other materials. One significant characteristic is luster; metals have a shiny appearance due to their ability to reflect light. Additionally, metals are generally dense, meaning they have a high mass per unit volume. This density contributes to their strength and makes them suitable for heavy-duty applications. Another important aspect of the metal definition is malleability and ductility. Malleability refers to the ability of a metal to be hammered or rolled into thin sheets without breaking, while ductility is the capacity to be drawn into wires. These properties make metals incredibly versatile, allowing them to be shaped and formed into various products. For example, gold is highly malleable and ductile, making it ideal for jewelry and intricate designs. Moreover, metals are excellent conductors of heat and electricity, which is a key factor in their use in electrical appliances and wiring systems. Copper, in particular, is widely used in electrical applications due to its high conductivity. Understanding the metal definition helps engineers and designers choose the right materials for specific applications, ensuring efficiency and safety in their projects. In addition to their physical properties, metals also exhibit unique chemical behaviors. For example, many metals react with oxygen to form oxides, which can affect their performance in certain environments. Understanding these reactions is vital for industries that require metal components to withstand harsh conditions, such as aerospace and automotive sectors. As we delve deeper into the metal definition, it becomes clear that metals are not just simple elements but complex materials that require careful consideration in their application. The study of metals, known as metallurgy, combines principles of physics and chemistry to explore how metals can be extracted, processed, and utilized effectively. In conclusion, the metal definition encompasses a wide range of properties and characteristics that are fundamental to understanding the role of metals in our world. From their classification to their physical and chemical properties, metals are integral to countless applications in modern society. As technology continues to advance, the importance of understanding the metal definition will only grow, paving the way for innovations in materials science and engineering.

术语metal definition指的是金属的分类和特性，金属是一组通常坚硬、有光泽、可锻造且良好导热和导电的元素。金属在周期表的左侧和中间部分被发现，它们在各个行业和日常生活中发挥着至关重要的作用。理解metal definition对于化学、工程和材料科学等领域的学生和专业人士来说是必不可少的。 金属可以根据其性质分为几类。例如，含铁的铁金属以其强度和耐用性而闻名。钢铁和铸铁就是常见的例子，广泛用于建筑和制造业。另一方面，非铁金属不含铁，通常更耐腐蚀。铝、铜和铅是常见的非铁金属，分别在电线、电包装和管道中应用。 metal definition还包括区分金属与其他材料的物理特性。其中一个显著特征是光泽；金属由于能反射光线而具有光亮的外观。此外，金属通常密度较大，即单位体积质量较高。这种密度使它们坚固，并使其适合重型应用。 metal definition的另一个重要方面是可锻性和延展性。可锻性是指金属在不破裂的情况下被锤打或轧制成薄片的能力，而延展性是指被拉成线的能力。这些特性使金属极具多功能性，能够被塑造成各种产品。例如，黄金的可锻性和延展性极高，因此非常适合用于珠宝和精致设计。 此外，金属是良好的热和电导体，这也是它们在电器和电线系统中使用的关键因素。尤其是铜，由于其高导电性，在电气应用中广泛使用。理解metal definition帮助工程师和设计师选择适合特定应用的材料，确保项目的效率和安全性。 除了物理特性，金属还表现出独特的化学行为。例如，许多金属与氧气反应形成氧化物，这可能影响它们在某些环境中的性能。理解这些反应对于需要金属部件在恶劣条件下工作的行业至关重要，例如航空航天和汽车行业。 深入探讨metal definition，我们会发现金属不仅仅是简单的元素，而是需要在应用中仔细考虑的复杂材料。金属学的研究结合了物理学和化学的原理，以探索如何有效地提取、加工和利用金属。 总之，metal definition涵盖了一系列基本的特性和特点，对于理解金属在我们世界中的作用至关重要。从它们的分类到物理和化学特性，金属在现代社会的无数应用中都是不可或缺的。随着技术的不断进步，理解metal definition的重要性只会增加，为材料科学和工程领域的创新铺平道路。