halogen
简明释义
n. [化学] 卤素
英英释义
单词用法
卤素灯，碘钨灯 | |
无卤；无卤素（技术） |
同义词
| 第17族元素 | 氟是一种高度反应性的第17族元素。 | ||
| 非金属 | Chlorine, a nonmetal, is commonly used for water purification. | 氯，作为一种非金属，常用于水的净化。 |
反义词
| 惰性气体 | 惰性气体用于照明和焊接应用。 | ||
| 碱金属 | 碱金属与水反应剧烈。 |
例句
1.Halogen atoms contain seven electrons in their valence shell.
卤原子在它们的介电子层含有七个电子。
2.Outstanding low smoke non halogen properties.
优异的低烟、无卤特性；
3.Polyethylene glycols can be used as effective phase transfer catalyst in halogen exchange fluorination.
聚乙二醇可作为卤素交换氟化反应有效的相转移催化剂。
4.Energy-saving, Environment friendly, and only 20% power consumption of halogen lamp and incandescent lamp.
能源节约，环境友好，只有20%的卤素灯和白炽灯的耗电量。
5.I bought a truck load of the 3500k ones and replaced each and every Halogen bulb in my Gallery and Viewing Room.
我买了一辆货车上的3500k的，改为每卤灯泡在我的画廊和播映室。
6.Halogen lights consume relatively more energy.
卤素灯消耗较多的能量。
7.Excessive absorption or lack of halogen group elements could result in disease.
过量摄入或缺乏卤族元素，都可能导致疾病的发生。
8.The birds were approaching, their halogen outlines flickering in the sunny air.
鸟儿接近，他们的卤素概述闪烁的阳光空气。
9.Note that ordinary quartz - halogen bulbs can not be applied here.
注意，普通的石英-卤素灯泡不能在此应用。
10.The halogen 卤素 lamp provides bright light and is energy-efficient.
这款卤素灯提供明亮的光线，并且节能。
11.In chemistry class, we learned about the properties of halogens 卤素 in Group 17 of the periodic table.
在化学课上，我们学习了周期表第17组中卤素的性质。
12.Many kitchen appliances use halogen 卤素 technology for faster cooking.
许多厨房电器使用卤素技术来加快烹饪速度。
13.The halogen 卤素 bulbs are often used in car headlights for better visibility.
卤素灯泡通常用于汽车大灯，以提高能见度。
14.Fluorine is the most reactive of the halogens 卤素 and can form compounds with almost all elements.
氟是最活泼的卤素，几乎可以与所有元素形成化合物。
作文
Halogens are a group of elements found in Group 17 of the periodic table. They include fluorine, chlorine, bromine, iodine, and astatine. These elements are known for their high reactivity, particularly with alkali and alkaline earth metals. The term halogen (卤素) itself means 'salt-former' in Greek, which is indicative of their ability to form salts when they react with metals. For example, when sodium, a highly reactive metal, reacts with chlorine, a halogen (卤素), it forms sodium chloride, commonly known as table salt.The physical properties of halogens (卤素) vary significantly among the group. Fluorine is a pale yellow gas at room temperature, while bromine is a reddish-brown liquid, and iodine appears as a shiny purple-black solid. This variation in states of matter highlights the unique characteristics of each halogen (卤素). Despite their differences, all halogens (卤素) share similar chemical properties due to their similar electron configurations, particularly their tendency to gain one electron to achieve a stable octet.One of the most interesting aspects of halogens (卤素) is their application in various industries. For instance, fluorine is used in the production of fluoropolymers, which are essential in non-stick cookware and waterproof clothing. Chlorine is widely used as a disinfectant in swimming pools and drinking water, ensuring that these environments remain safe for human use. Bromine compounds are utilized in flame retardants, protecting materials from catching fire easily. Iodine, another important halogen (卤素), is crucial in the medical field as an antiseptic and is also used in nutritional supplements to prevent iodine deficiency.However, the reactivity of halogens (卤素) can also lead to environmental concerns. For example, chlorofluorocarbons (CFCs), which contain chlorine, have been linked to ozone depletion. The release of these compounds into the atmosphere has caused significant harm to the ozone layer, leading to increased UV radiation reaching the Earth's surface. This has prompted global efforts to phase out the use of CFCs and other harmful halogen (卤素) compounds.In conclusion, halogens (卤素) play a vital role in both our daily lives and various industrial applications. Their ability to form salts and their diverse physical properties make them fascinating elements in the periodic table. While they offer numerous benefits, it is essential to handle them responsibly to mitigate any adverse effects on the environment. The study of halogens (卤素) not only enriches our understanding of chemistry but also emphasizes the importance of sustainable practices in utilizing these powerful elements.
