atomic weight

简明释义

原子量

英英释义

例句

1.Scientists often refer to the atomic weight when discussing isotopes and their stability.

科学家在讨论同位素及其稳定性时常常提到原子量。

2.The atomic weight of hydrogen is approximately 1.008, which means it is the lightest element on the periodic table.

氢的原子量约为1.008，这意味着它是周期表上最轻的元素。

3.The periodic table lists the atomic weight of elements, which helps in understanding their properties.

周期表列出了元素的原子量，这有助于理解它们的性质。

4.The atomic weight of carbon is about 12.01, which plays a crucial role in organic chemistry.

碳的原子量约为12.01，这在有机化学中起着至关重要的作用。

5.When calculating the molar mass of a compound, you need to consider the atomic weight of each element involved.

在计算化合物的摩尔质量时，您需要考虑每个元素的原子量。

作文

Understanding the concept of atomic weight is fundamental to the field of chemistry. It allows scientists to quantify the mass of atoms in relation to one another, providing a basis for calculations involving chemical reactions and the formation of compounds. Atomic weight, defined as the weighted average mass of an element's isotopes, is measured in atomic mass units (amu). This measurement takes into account the natural abundance of each isotope, making it a crucial parameter in determining how elements interact in various chemical processes.For example, consider the element carbon. Carbon has two stable isotopes: carbon-12 and carbon-13. The atomic weight of carbon is approximately 12.01 amu, which reflects the relative abundance of these isotopes in nature. This means that most carbon atoms found in nature are carbon-12, but the presence of carbon-13 also contributes to the overall atomic weight value. Understanding this concept is essential for chemists when they calculate the amounts of reactants needed for a reaction or when they analyze the products formed.In addition to its importance in chemical calculations, the atomic weight of an element can also provide insights into its properties and behavior. Elements with similar atomic weights often exhibit similar chemical behaviors due to their comparable atomic structures. For instance, elements in the same group of the periodic table tend to have similar reactivity patterns, which can be partly attributed to their atomic weights. Therefore, studying atomic weight not only aids in practical applications but also enhances our understanding of the periodic trends that govern elemental properties.Moreover, the determination of atomic weight has evolved over time. Historically, early chemists used hydrogen as a reference point, assigning it an atomic weight of 1. As scientific techniques advanced, the accuracy of measuring atomic weights improved significantly. Today, methods such as mass spectrometry allow for precise determination of atomic weight by measuring the mass-to-charge ratio of ions. This advancement has led to more accurate values for atomic weights and better understanding of isotopic compositions.In practical applications, knowing the atomic weight of elements is vital for industries ranging from pharmaceuticals to materials science. In drug development, for instance, the precise calculation of reactant quantities based on their atomic weights ensures the effectiveness and safety of medications. Similarly, in materials science, understanding the atomic weight of elements helps engineers design stronger and lighter materials by selecting appropriate combinations of elements based on their atomic weights.In conclusion, the concept of atomic weight is more than just a number; it is a key to unlocking the mysteries of chemical interactions and properties. By grasping the significance of atomic weight, students and professionals alike can enhance their understanding of chemistry and its applications in the real world. As we continue to explore the universe at the atomic level, the importance of accurately determining atomic weights cannot be overstated, as it forms the foundation upon which much of modern chemistry is built.

理解原子量的概念对化学领域至关重要。它使科学家能够量化原子之间的质量关系，为涉及化学反应和化合物形成的计算提供基础。原子量被定义为元素同位素的加权平均质量，以原子质量单位（amu）测量。这一测量考虑了每种同位素的自然丰度，使其成为确定元素在各种化学过程中的相互作用的重要参数。例如，考虑元素碳。碳有两个稳定的同位素：碳-12和碳-13。碳的原子量约为12.01 amu，这反映了这些同位素在自然界中的相对丰度。这意味着大多数自然界中发现的碳原子是碳-12，但碳-13的存在也会对整体的原子量值产生贡献。理解这一概念对于化学家在计算反应所需的反应物数量或分析形成的产物时至关重要。除了在化学计算中的重要性外，元素的原子量还可以提供关于其性质和行为的见解。具有相似原子量的元素通常由于其相似的原子结构而表现出相似的化学行为。例如，周期表中同一组的元素往往具有相似的反应模式，这部分可以归因于它们的原子量。因此，研究原子量不仅有助于实际应用，还增强了我们对支配元素性质的周期性趋势的理解。此外，原子量的确定经历了时间的演变。历史上，早期的化学家使用氢作为参考点，将其原子量赋值为1。随着科学技术的进步，测量原子量的准确性显著提高。今天，质谱法等方法允许通过测量离子的质荷比来精确确定原子量。这一进展导致了对原子量更准确的数值和同位素组成的更好理解。在实际应用中，了解元素的原子量对制药、材料科学等行业至关重要。例如，在药物开发中，基于其原子量精确计算反应物数量可确保药物的有效性和安全性。同样，在材料科学中，理解元素的原子量有助于工程师通过根据其原子量选择适当的元素组合来设计更强大和轻便的材料。总之，原子量的概念不仅仅是一个数字；它是解锁化学相互作用和性质奥秘的钥匙。通过掌握原子量的重要性，学生和专业人士都可以增强对化学及其在现实世界中的应用的理解。随着我们继续在原子层面探索宇宙，准确确定原子量的重要性不容低估，因为它构成了现代化学的基础。