atomic mass unit

简明释义

原子质量单位

英英释义

例句

1.When calculating molecular weights, we sum the atomic mass units (原子质量单位) of all constituent atoms.

在计算分子量时，我们将所有组成原子的原子质量单位相加.

2.The mass of a hydrogen atom is approximately 1 atomic mass unit (氢原子的质量大约是1个原子质量单位).

氢原子的质量大约是1个原子质量单位.

3.In chemistry, we often use the atomic mass unit (原子质量单位) to express the masses of atoms and molecules.

在化学中，我们常用原子质量单位来表示原子和分子的质量.

4.Oxygen has an approximate atomic mass of 16 atomic mass units (氧的原子质量大约是16个原子质量单位).

氧的原子质量大约是16个原子质量单位.

5.Carbon-12 is defined as having a mass of exactly 12 atomic mass units (碳-12的质量被定义为正好12个原子质量单位).

碳-12的质量被定义为正好12个原子质量单位.

作文

The concept of the atomic mass unit is fundamental in the field of chemistry and physics. It allows scientists to quantify the mass of atoms in a standardized way, making it easier to compare different elements and compounds. The atomic mass unit, often abbreviated as amu, is defined as one twelfth of the mass of a carbon-12 atom. This definition provides a reliable reference point for measuring the masses of other atomic particles. Understanding the atomic mass unit is crucial for students and professionals alike, as it plays a significant role in various scientific calculations. For instance, when determining the molecular weight of a compound, chemists use the atomic mass unit to sum the masses of all the constituent atoms. This information is vital for predicting how substances will react with one another and for calculating the amounts needed in chemical reactions.Moreover, the atomic mass unit serves as a bridge between the microscopic world of atoms and the macroscopic world of grams. Since atoms are incredibly small, their masses are measured in atomic mass units, while larger quantities of material are typically measured in grams. This conversion is essential in laboratory settings where precise measurements are required. In addition to its practical applications, the atomic mass unit also has historical significance. The development of this unit reflects the evolution of our understanding of atomic structure. Early scientists had to rely on relative comparisons, but the introduction of the atomic mass unit provided a more systematic approach to studying matter. As technology advanced, particularly with techniques like mass spectrometry, the precision of atomic mass unit measurements improved dramatically, leading to new discoveries in both chemistry and physics.Furthermore, the atomic mass unit is essential in fields such as biochemistry and pharmacology. When developing new drugs, researchers must calculate the molecular weights of compounds to ensure proper dosages and efficacy. The atomic mass unit allows them to do this accurately, facilitating the discovery of effective treatments for various diseases.In conclusion, the atomic mass unit is a critical concept that underpins much of modern science. Its ability to provide a standardized measure of atomic mass enables scientists to perform calculations, make predictions, and conduct experiments with confidence. As we continue to explore the complexities of the atomic world, the atomic mass unit will remain an indispensable tool in our quest for knowledge. Understanding this unit not only enhances our grasp of chemistry and physics but also enriches our appreciation of the intricate nature of the universe. In summary, the atomic mass unit (原子质量单位) is a crucial concept in the scientific community, allowing for accurate measurements and comparisons of atomic masses. It bridges the gap between the tiny world of atoms and the larger scale used in everyday measurements, making it an essential part of scientific research and application.

原子质量单位（atomic mass unit）是化学和物理领域的基本概念。它使科学家能够以标准化的方式量化原子的质量，从而更容易比较不同的元素和化合物。atomic mass unit通常缩写为amu，定义为碳-12原子质量的十二分之一。这个定义为测量其他原子粒子的质量提供了可靠的参考点。理解atomic mass unit对于学生和专业人士来说至关重要，因为它在各种科学计算中发挥着重要作用。例如，在确定化合物的分子量时，化学家使用atomic mass unit来求和所有组成原子的质量。这些信息对于预测物质之间的反应以及计算化学反应所需的量至关重要。此外，atomic mass unit在微观原子世界和宏观克世界之间起到了桥梁作用。由于原子极其微小，其质量以atomic mass unit来测量，而较大数量的物质通常以克来测量。这种转换在实验室设置中至关重要，因为精确的测量是必需的。除了其实际应用外，atomic mass unit还有历史意义。这个单位的发展反映了我们对原子结构理解的演变。早期科学家不得不依赖相对比较，但atomic mass unit的引入为研究物质提供了更系统的方法。随着技术的进步，特别是质量谱法等技术的出现，atomic mass unit测量的精度显著提高，导致化学和物理领域的新发现。此外，atomic mass unit在生物化学和药理学等领域也至关重要。在开发新药时，研究人员必须计算化合物的分子量，以确保适当的剂量和疗效。atomic mass unit使他们能够准确地做到这一点，从而促进了对各种疾病有效治疗的发现。总之，atomic mass unit是现代科学的关键概念。它提供的原子质量标准化测量使科学家能够自信地进行计算、做出预测和进行实验。随着我们继续探索原子世界的复杂性，atomic mass unit将继续成为我们追求知识的不可或缺的工具。理解这个单位不仅增强了我们对化学和物理的掌握，也丰富了我们对宇宙复杂本质的欣赏。总之，atomic mass unit（原子质量单位）是科学界的一个关键概念，它允许对原子质量进行准确的测量和比较。它弥补了微小的原子世界与日常测量中使用的较大尺度之间的差距，使其成为科学研究和应用的重要组成部分。