alkaline earth metal

简明释义

碱土金属

英英释义

例句

1.Barium, a heavy alkaline earth metal, is used in medical imaging as a contrast agent.

钡，一种重的碱土金属，在医学成像中用作对比剂。

2.Beryllium, an alkaline earth metal, is used in aerospace components due to its lightweight properties.

铍，作为一种碱土金属，因其轻质特性被用于航空航天组件。

3.Calcium, an essential alkaline earth metal, plays a crucial role in biological systems.

钙，这种必需的碱土金属，在生物系统中起着至关重要的作用。

4.Magnesium, another alkaline earth metal, is often used in fireworks for its bright white flame.

镁，另一种碱土金属，常用于烟花中以产生明亮的白色火焰。

5.Strontium, known for its alkaline earth metal properties, is used in producing red flames in pyrotechnics.

锶，以其碱土金属特性而闻名，用于在烟火中产生红色火焰。

作文

The term alkaline earth metal refers to a group of elements found in Group 2 of the periodic table. These metals include beryllium, magnesium, calcium, strontium, barium, and radium. They are characterized by their shiny appearance and are typically silvery-white in color. One of the most interesting aspects of alkaline earth metals is their reactivity; they are less reactive than alkali metals, but they still react readily with water and oxygen. For instance, when calcium reacts with water, it produces calcium hydroxide and hydrogen gas, demonstrating its chemical activity. The alkaline earth metals have unique properties that make them valuable in various applications. Magnesium, for example, is used extensively in the aerospace industry due to its lightweight and strong characteristics. It is also an essential element in biological systems, playing a crucial role in over 300 enzymatic reactions in the human body. Calcium is another important alkaline earth metal, known for its role in building strong bones and teeth. It is also used in the production of cement and concrete, making it vital for construction. In terms of occurrence, alkaline earth metals are not found in their elemental form in nature due to their high reactivity. Instead, they are primarily found in various minerals. For example, barium is often extracted from barite, a mineral that contains barium sulfate. The extraction and processing of these metals require careful handling because of their reactive nature. The compounds formed by alkaline earth metals are also noteworthy. Many of these compounds, such as calcium carbonate and magnesium sulfate, are commonly found in nature and have significant industrial uses. Calcium carbonate, for instance, is a major component of limestone and is widely used in construction, while magnesium sulfate, often known as Epsom salt, has applications in agriculture and medicine. Furthermore, alkaline earth metals play a crucial role in various chemical processes. They tend to form ionic bonds with nonmetals, resulting in the formation of stable compounds. This characteristic makes them essential in the production of fertilizers and other chemical products. In conclusion, understanding the significance of alkaline earth metals is essential for both scientific study and practical applications. Their unique properties, reactivity, and the wide range of compounds they form contribute to their importance in various fields, from construction to healthcare. As we continue to explore the periodic table and the elements within it, the alkaline earth metals will undoubtedly remain a topic of interest and research. In summary, the alkaline earth metal (碱土金属) group includes vital elements that are integral to many aspects of our daily lives and industries. Their unique characteristics and chemical behavior make them fascinating subjects for further study.

短语alkaline earth metal指的是周期表第2组的一组元素。这些金属包括铍、镁、钙、锶、钡和镭。它们的特点是外观光亮，通常呈银白色。alkaline earth metal最有趣的方面之一是它们的反应性；它们的反应性低于碱金属，但仍然会与水和氧气迅速反应。例如，当钙与水反应时，会产生氢氧化钙和氢气，展示了其化学活性。alkaline earth metals具有独特的性质，使它们在各种应用中非常有价值。例如，镁因其轻便和强度特性而在航空航天工业中被广泛使用。它也是生物系统中的重要元素，在人体内参与300多种酶促反应。钙是另一种重要的alkaline earth metal，以其在构建强壮骨骼和牙齿中的作用而闻名。它还用于水泥和混凝土的生产，使其对建筑业至关重要。在出现方面，alkaline earth metals由于其高反应性而不能以元素形式存在于自然界中。相反，它们主要存在于各种矿物中。例如，钡通常从重晶石中提取，重晶石是一种含有硫酸钡的矿物。由于其反应性，这些金属的提取和加工需要小心处理。由alkaline earth metals形成的化合物也值得注意。这些化合物中的许多，例如碳酸钙和硫酸镁，通常在自然界中发现，并具有重要的工业用途。例如，碳酸钙是石灰石的主要成分，广泛用于建筑，而硫酸镁，通常称为泻盐，在农业和医学中有应用。此外，alkaline earth metals在各种化学过程中发挥着关键作用。它们倾向于与非金属形成离子键，从而形成稳定的化合物。这一特征使它们在肥料和其他化学产品的生产中至关重要。总之，理解alkaline earth metals的重要性对于科学研究和实际应用都是必不可少的。它们独特的属性、反应性以及它们形成的各种化合物都使它们在建筑、医疗等多个领域中变得重要。随着我们继续探索周期表及其内部的元素，alkaline earth metals无疑将继续成为研究和关注的主题。总之，alkaline earth metal（碱土金属）组包括对我们日常生活和各个行业至关重要的元素。它们独特的特性和化学行为使它们成为进一步研究的迷人主题。