alkali-earth metal

简明释义

碱土金属;

英英释义

例句

1.The reactivity of alkali-earth metal 碱土金属 increases as you move down the group in the periodic table.

随着在周期表中向下移动，碱土金属的反应性增强。

2.Magnesium, an alkali-earth metal 碱土金属, is often used in fireworks for its bright white flame.

镁是一种常用于烟火中产生明亮白光的碱土金属。

3.The properties of alkali-earth metal 碱土金属 elements make them useful in various industrial applications.

这些碱土金属的性质使它们在各种工业应用中非常有用。

4.In chemistry class, we learned that alkali-earth metal 碱土金属 ions are typically found in nature combined with other elements.

在化学课上，我们了解到碱土金属离子通常与其他元素结合在自然界中存在。

5.Calcium, a common alkali-earth metal 碱土金属, is essential for bone health.

钙是常见的碱土金属，对骨骼健康至关重要。

作文

The periodic table is a fascinating representation of the elements that compose our universe. Among these elements, the group known as alkali-earth metals plays a significant role in various chemical reactions and applications. The alkali-earth metals consist of six elements: beryllium, magnesium, calcium, strontium, barium, and radium. These metals are characterized by their shiny appearance and relatively low density compared to other metals. They are located in Group 2 of the periodic table and are known for their unique properties and reactivity. One of the most notable characteristics of alkali-earth metals is their tendency to react with water, although not as vigorously as their counterparts in Group 1, the alkali metals. For instance, when calcium reacts with water, it produces calcium hydroxide and hydrogen gas. This reaction is less explosive than that of sodium or potassium, but it still demonstrates the reactivity of alkali-earth metals. These metals also play a crucial role in biological systems. Magnesium, for example, is an essential element for all living organisms. It is a key component of chlorophyll, the molecule that allows plants to photosynthesize. Without magnesium, life as we know it would not be possible. Similarly, calcium is vital for bone health in humans and many animals. It contributes to the structural integrity of bones and teeth, making it indispensable for growth and development. In addition to their biological significance, alkali-earth metals have numerous industrial applications. Magnesium is widely used in the aerospace industry due to its lightweight and strength, making it ideal for aircraft components. Barium is utilized in medical imaging, particularly in barium meals for X-ray examinations of the digestive system. The unique properties of alkali-earth metals allow them to be employed in various fields, from construction to electronics. Despite their usefulness, handling alkali-earth metals requires caution. As mentioned earlier, they can react with water, and some of them, like barium, can be toxic in certain forms. Therefore, proper safety measures must be taken when working with these metals in laboratory and industrial settings. In conclusion, alkali-earth metals are a remarkable group of elements that exhibit unique properties and play significant roles in both nature and industry. Understanding their characteristics and applications helps us appreciate the complexity of the periodic table and the importance of these metals in our daily lives. As science continues to advance, further research on alkali-earth metals may lead to new discoveries and innovations that can benefit humanity. Their contributions to chemistry, biology, and technology underline the interconnectedness of all scientific disciplines and the ongoing pursuit of knowledge in understanding the world around us.

周期表是我们宇宙中构成元素的迷人表现。在这些元素中，被称为碱土金属的一组元素在各种化学反应和应用中发挥着重要作用。碱土金属包括六种元素：铍、镁、钙、锶、钡和镭。这些金属的特点是外观光亮且与其他金属相比，密度相对较低。它们位于周期表的第2组，以其独特的性质和反应性而闻名。碱土金属最显著的特点之一是它们与水的反应倾向，尽管不如第1组的碱金属那样剧烈。例如，当钙与水反应时，会产生氢氧化钙和氢气。这种反应不如钠或钾那样爆炸性强，但仍然展示了碱土金属的反应性。这些金属在生物系统中也发挥着至关重要的作用。镁例如，是所有生物体所必需的元素。它是叶绿素的关键成分，叶绿素是允许植物进行光合作用的分子。如果没有镁，生命将无法像我们所知的那样存在。同样，钙对于人类和许多动物的骨骼健康至关重要。它有助于骨骼和牙齿的结构完整性，使其在生长和发育中不可或缺。除了生物学的重要性，碱土金属还有许多工业应用。镁因其轻质和强度广泛用于航空航天工业，非常适合用作飞机部件。钡被用于医学成像，特别是在消化系统的钡餐X光检查中。碱土金属的独特特性使它们能够在从建筑到电子等各个领域中得到应用。尽管它们很有用，但处理碱土金属时需要谨慎。如前所述，它们可以与水反应，其中一些，如钡，在某些形式下可能是有毒的。因此，在实验室和工业环境中工作时，必须采取适当的安全措施。总之，碱土金属是一组显著的元素，展现出独特的性质，并在自然和工业中发挥重要作用。了解它们的特征和应用有助于我们欣赏周期表的复杂性，以及这些金属在我们日常生活中的重要性。随着科学的不断进步，对碱土金属的进一步研究可能会带来新的发现和创新，从而造福人类。它们对化学、生物学和技术的贡献强调了所有科学学科之间的相互联系，以及在理解我们周围世界的过程中对知识的持续追求。