atomic weight

简明释义

原子量

英英释义

例句

1.In chemistry, the atomic weight (原子量) helps in determining the proportions of elements in reactions.

在化学中，原子量（原子量）有助于确定反应中元素的比例。

2.To calculate the molar mass of a compound, you need to know the atomic weight (原子量) of each element in it.

要计算化合物的摩尔质量，您需要知道其中每种元素的原子量（原子量）。

3.The periodic table lists the elements along with their atomic weight (原子量) for easy reference.

元素周期表列出了元素及其原子量（原子量），以便于参考。

4.The atomic weight (原子量) of carbon is approximately 12.01.

碳的原子量（原子量）约为12.01。

5.Different isotopes of an element have different atomic weights (原子量).

元素的不同同位素具有不同的原子量（原子量）。

作文

Understanding the concept of atomic weight is essential for anyone studying chemistry. The term atomic weight refers to the average mass of an atom of an element, measured in atomic mass units (amu). This value is not a simple integer because it accounts for the existence of isotopes—atoms of the same element that have different numbers of neutrons. For example, carbon has an atomic weight of approximately 12.01 amu. This value reflects the natural abundance of its isotopes, primarily carbon-12 and carbon-13.When we look at the periodic table, we can see that each element has its own unique atomic weight. This information is crucial for various applications in science and industry. In chemical reactions, knowing the atomic weight allows chemists to calculate the amounts of reactants and products involved. It helps in determining the stoichiometry of a reaction, which is the quantitative relationship between the substances consumed and produced.Moreover, the atomic weight plays a significant role in fields such as pharmacology and materials science. For instance, when developing new medications, scientists must consider how different elements interact based on their atomic weights. The effectiveness of a drug can depend on the precise ratios of its components, which are dictated by their respective atomic weights.In addition to practical applications, understanding atomic weight enhances our comprehension of the universe. The atomic weight of elements influences their behavior in stars and during nuclear reactions. For example, hydrogen, with the lowest atomic weight, is the primary fuel for stars. As stars fuse hydrogen into helium, they release energy, which powers them and produces heavier elements through nucleosynthesis.Furthermore, the concept of atomic weight also leads us to appreciate the historical development of chemistry. The determination of atomic weights has evolved over centuries, from John Dalton’s early atomic theory to modern techniques involving mass spectrometry. These advancements have allowed scientists to refine their measurements and improve our understanding of elemental properties.In summary, the significance of atomic weight extends far beyond the classroom. It is a fundamental concept that underpins many scientific disciplines and practical applications. By grasping the meaning and implications of atomic weight, students and professionals alike can better engage with the material world around them. Whether in a laboratory, a pharmacy, or even in astrophysics, the principles associated with atomic weight are vital for advancing knowledge and innovation in science. Thus, a thorough understanding of this concept is not only beneficial but necessary for anyone looking to explore the depths of chemistry and its related fields.

理解原子量的概念对于任何学习化学的人来说都是至关重要的。术语原子量指的是元素原子的平均质量，以原子质量单位（amu）为单位测量。这个值并不是一个简单的整数，因为它考虑了同位素的存在——同一元素的原子具有不同数量的中子。例如，碳的原子量约为12.01 amu。这个值反映了其同位素的自然丰度，主要是碳-12和碳-13。当我们查看周期表时，可以看到每个元素都有其独特的原子量。这些信息对于科学和工业中的各种应用至关重要。在化学反应中，了解原子量使化学家能够计算参与的反应物和产品的数量。它有助于确定反应的化学计量，即消耗和产生的物质之间的定量关系。此外，原子量在药理学和材料科学等领域也发挥着重要作用。例如，在开发新药物时，科学家必须考虑不同元素根据其原子量的相互作用。药物的有效性可能依赖于其成分的精确比例，而这些比例由各自的原子量决定。除了实际应用，理解原子量还增强了我们对宇宙的理解。元素的原子量影响它们在恒星中的行为以及在核反应中的表现。例如，氢的原子量最低，是恒星的主要燃料。当恒星将氢融合成氦时，它们释放能量，这为它们提供动力，并通过核合成产生更重的元素。此外，原子量的概念也让我们欣赏化学的历史发展。从约翰·道尔顿早期的原子理论到现代的质谱技术，原子量的测定经历了几个世纪的演变。这些进步使科学家能够精确测量并改善我们对元素特性的理解。总之，原子量的重要性远不止于课堂。它是许多科学学科和实际应用的基础概念。通过掌握原子量的含义及其影响，学生和专业人士都可以更好地与周围的物质世界互动。无论是在实验室、药房还是在天体物理学中，与原子量相关的原则对于推动科学知识和创新至关重要。因此，透彻理解这一概念不仅是有益的，而且是任何希望探索化学及其相关领域深度的人所必需的。