polar molecule

简明释义

极化分子

英英释义

例句

1.Due to its polar molecule nature, water can dissolve many ionic compounds.

由于其极性分子的特性，水可以溶解许多离子化合物。

2.The polar molecule behavior of alcohols affects their solubility in water.

醇类的极性分子行为影响它们在水中的溶解度。

3.The polar molecule structure of ammonia allows it to form hydrogen bonds.

氨的极性分子结构使其能够形成氢键。

4.Water is a classic example of a polar molecule, which means it has a positive and a negative end.

水是一个经典的极性分子例子，这意味着它有一个正端和一个负端。

5.In biology, the polar molecule properties of phospholipids help form cell membranes.

在生物学中，磷脂的极性分子特性帮助形成细胞膜。

作文

Understanding the concept of a polar molecule is essential in the study of chemistry and biology. A polar molecule is defined as a molecule that has a net dipole moment due to the presence of polar bonds, which arise from the unequal sharing of electrons between atoms. This characteristic leads to one end of the molecule having a slight positive charge while the other end carries a slight negative charge. Water (H2O) is one of the most common examples of a polar molecule. The oxygen atom is more electronegative than the hydrogen atoms, resulting in a partial negative charge near the oxygen and a partial positive charge near the hydrogens.The polarity of a polar molecule plays a crucial role in its interactions with other molecules. For instance, the unique properties of water, such as its high boiling point and surface tension, can be attributed to its polar molecule structure. Water molecules are attracted to each other through hydrogen bonding, a type of attraction that occurs between the positively charged hydrogen atoms of one water molecule and the negatively charged oxygen atoms of another. This phenomenon is vital for life on Earth, as it allows for the transport of nutrients and waste in biological systems.In contrast, nonpolar molecules, which do not have a significant difference in electronegativity between their constituent atoms, do not exhibit this dipole moment. Examples of nonpolar molecules include oils and fats, which do not mix with water due to their lack of polarity. This property is particularly important in biological systems, where the separation of polar and nonpolar substances can affect cellular structures and functions. For example, cell membranes are primarily composed of phospholipids, which have both polar and nonpolar regions. This arrangement allows them to form a bilayer that separates the interior of the cell from the external environment, facilitating the selective transport of substances.Moreover, the concept of polar molecules extends beyond simple chemistry. In environmental science, understanding the behavior of polar molecules can help us grasp how pollutants interact with water bodies. Many harmful substances are polar molecules, making them soluble in water and thus easily transported through ecosystems. This solubility can lead to significant ecological impacts, as these pollutants can accumulate in aquatic organisms and disrupt food chains.In conclusion, the study of polar molecules is fundamental in various scientific fields. Their unique properties influence chemical reactions, biological processes, and environmental interactions. By comprehending the nature of polar molecules, we gain insights into the mechanisms that sustain life and the challenges posed by pollution. As we continue to explore the complexities of molecular interactions, the significance of polar molecules will undoubtedly remain a central theme in our understanding of the natural world.

理解极性分子的概念在化学和生物学研究中至关重要。极性分子被定义为由于极性键的存在而具有净偶极矩的分子，这种极性键是由于原子之间不均匀的电子共享而产生的。这一特征导致分子的一个端部带有轻微的正电荷，而另一个端部则带有轻微的负电荷。水（H2O）是最常见的极性分子之一。氧原子的电负性高于氢原子，导致氧附近带有部分负电荷，而氢附近则带有部分正电荷。极性分子的极性在其与其他分子的相互作用中起着至关重要的作用。例如，水的独特性质，如高沸点和表面张力，可以归因于其极性分子结构。水分子通过氢键相互吸引，这是一种发生在一个水分子的正电荷氢原子和另一个水分子的负电荷氧原子之间的吸引现象。这一现象对地球上的生命至关重要，因为它允许养分和废物在生物系统中运输。相比之下，非极性分子在其组成原子之间没有显著的电负性差异，因此不表现出这种偶极矩。非极性分子的例子包括油和脂肪，由于缺乏极性，它们不与水混合。这种特性在生物系统中尤为重要，因为极性和非极性物质的分离会影响细胞结构和功能。例如，细胞膜主要由磷脂组成，磷脂具有极性和非极性区域。这种排列使它们能够形成双层，从而将细胞内部与外部环境分开，促进物质的选择性运输。此外，极性分子的概念超越了简单的化学。在环境科学中，理解极性分子的行为可以帮助我们掌握污染物如何与水体相互作用。许多有害物质是极性分子，使它们在水中溶解，从而容易在生态系统中传播。这种溶解性可能导致重大生态影响，因为这些污染物可以在水生生物中积累并破坏食物链。总之，极性分子的研究在各个科学领域都是基础。它们的独特性质影响化学反应、生物过程和环境相互作用。通过理解极性分子的本质，我们能够深入了解维持生命的机制以及污染带来的挑战。随着我们继续探索分子相互作用的复杂性，极性分子的重要性无疑将成为我们理解自然世界的核心主题。