alkaline earth metal

简明释义

碱土金属;

英英释义

例句

1.The reactivity of alkaline earth metals increases as you move down the group.

随着你向下移动，碱土金属的反应性增加。

2.Strontium, an alkaline earth metal, is known for its bright red flame in fireworks.

锶，一种碱土金属，以其在烟花中的鲜红色火焰而闻名。

3.Magnesium, another alkaline earth metal, plays a key role in muscle function.

镁，另一种碱土金属，在肌肉功能中起着关键作用。

4.Barium, a heavy alkaline earth metal, is used in medical imaging.

钡，一种重的碱土金属，用于医学成像。

5.Calcium, an important alkaline earth metal, is essential for healthy bones.

钙，这种重要的碱土金属，对健康骨骼至关重要。

作文

Alkaline earth metals, represented in the periodic table as Group 2 elements, include beryllium, magnesium, calcium, strontium, barium, and radium. These elements are characterized by their shiny appearance and are relatively soft compared to other metals. One of the most interesting aspects of alkaline earth metals (碱土金属) is their reactivity. They are known to react with water, although not as vigorously as alkali metals found in Group 1. For instance, when calcium reacts with water, it produces calcium hydroxide and hydrogen gas, demonstrating a typical reaction for alkaline earth metals (碱土金属). The term 'alkaline' refers to the basic nature of their oxides and hydroxides, which can neutralize acids, while 'earth' historically refers to the non-metallic nature of these compounds. The alkaline earth metals (碱土金属) are never found in their elemental form in nature due to their high reactivity; instead, they exist in various compounds. For example, calcium carbonate, commonly found in limestone and marble, is a compound of calcium, an alkaline earth metal (碱土金属). Each alkaline earth metal (碱土金属) has unique properties and applications. Magnesium, for instance, is lightweight and is used in aerospace applications, while calcium is essential for biological systems, particularly in the formation of bones and teeth. Strontium is used in fireworks to produce red colors, and barium is utilized in medical imaging. These diverse applications highlight the importance of alkaline earth metals (碱土金属) in both industrial and biological contexts. Despite their similarities, the reactivity of alkaline earth metals (碱土金属) increases down the group. Beryllium is the least reactive, while barium is among the most reactive. This trend can be attributed to the increasing atomic size and decreasing ionization energy as we move down the group. Understanding these trends is crucial for chemists and engineers who work with these elements. In summary, alkaline earth metals (碱土金属) play a vital role in various fields, from construction and manufacturing to medicine and environmental science. Their fascinating chemical properties and reactivity make them a subject of interest not only in chemistry but also in practical applications that impact our daily lives. As we continue to explore the characteristics and uses of alkaline earth metals (碱土金属), we uncover more about their significance in both nature and technology.