chemical atomic weight

简明释义

化学原子量

英英释义

例句

1.In organic chemistry, understanding the chemical atomic weight of functional groups is important for synthesis.

在有机化学中，理解官能团的化学原子量对于合成非常重要。

2.The chemical atomic weight of oxygen is about 16, which helps in determining the amount needed for combustion reactions.

氧的化学原子量约为16，这有助于确定燃烧反应所需的量。

3.Chemists often refer to the periodic table to find the chemical atomic weight of elements.

化学家经常参考周期表来查找元素的化学原子量。

4.The chemical atomic weight of carbon is approximately 12.01, which is critical for calculating molecular formulas.

碳的化学原子量约为12.01，这对于计算分子式至关重要。

5.When performing stoichiometric calculations, it's essential to know the chemical atomic weight of each element involved.

在进行化学计量计算时，了解每个参与元素的化学原子量是必不可少的。

作文

The concept of chemical atomic weight is fundamental to the field of chemistry. It refers to the average mass of an atom of a chemical element, measured in atomic mass units (amu). This measurement is crucial because it helps chemists understand the proportions of different elements that combine to form compounds. For instance, when we look at water, which has the chemical formula H2O, we can calculate its molecular weight by adding the weights of its constituent atoms: two hydrogen atoms and one oxygen atom. The chemical atomic weight of hydrogen is approximately 1.008 amu, while that of oxygen is about 16.00 amu. Therefore, the molecular weight of water is around 18.016 amu.Understanding chemical atomic weight is essential not only for theoretical chemistry but also for practical applications. In pharmaceuticals, for example, knowing the exact weights of the elements that make up a drug can determine the correct dosage required for effective treatment. If a drug's formulation is off due to incorrect calculations of chemical atomic weight, it could lead to ineffective treatment or even harmful side effects.Moreover, the chemical atomic weight of an element is not always a whole number. This is because it takes into account the isotopes of an element, which are atoms with the same number of protons but different numbers of neutrons. For example, carbon has an atomic weight of about 12.01 amu due to the presence of both carbon-12 and carbon-13 isotopes in nature. This averaging process is crucial for accurate scientific calculations.In addition to its significance in chemistry, chemical atomic weight plays a role in various other scientific disciplines, including physics and environmental science. For instance, in atmospheric studies, understanding the atomic weights of gases helps scientists predict how they will behave under different conditions. This knowledge is vital for addressing issues like climate change and air quality.Furthermore, the concept of chemical atomic weight has historical importance. The development of atomic theory and the periodic table were heavily influenced by early attempts to measure the weights of atoms. Scientists like John Dalton, who proposed the first modern atomic theory, relied on the idea of atomic weights to explain chemical reactions and compound formation. His work laid the foundation for our current understanding of chemistry.In conclusion, the chemical atomic weight is a critical concept that bridges theoretical and practical aspects of chemistry. It allows scientists to perform calculations that are essential for a wide range of applications, from drug formulation to environmental studies. As we continue to advance our understanding of the atomic world, the importance of chemical atomic weight will undoubtedly remain a key element in the ongoing exploration of matter and its interactions.

“化学原子量”这一概念在化学领域中是基础性的。它指的是化学元素一个原子的平均质量，单位为原子质量单位（amu）。这一测量至关重要，因为它帮助化学家理解不同元素结合形成化合物的比例。例如，当我们观察水时，其化学式为H2O，我们可以通过将其组成原子的重量相加来计算其分子量：两个氢原子和一个氧原子。氢的化学原子量约为1.008 amu，而氧的约为16.00 amu。因此，水的分子量大约为18.016 amu。理解化学原子量不仅对理论化学至关重要，而且对实际应用也同样重要。例如，在制药行业，了解构成药物的元素的确切重量可以确定有效治疗所需的正确剂量。如果由于对化学原子量的错误计算而导致药物配方不准确，可能会导致治疗效果不佳或甚至有害的副作用。此外，元素的化学原子量并不总是一个整数。这是因为它考虑了元素的同位素，同位素是指质子数相同但中子数不同的原子。例如，碳的原子量约为12.01 amu，这是因为自然界中存在碳-12和碳-13同位素。这一平均过程对于科学计算的准确性至关重要。除了在化学中的重要性外，化学原子量在其他科学领域也发挥着作用，包括物理学和环境科学。例如，在大气研究中，理解气体的原子量有助于科学家预测它们在不同条件下的行为。这一知识对于解决气候变化和空气质量等问题至关重要。此外，化学原子量的概念具有历史意义。原子理论和周期表的发展受到早期测量原子重量尝试的重大影响。约翰·道尔顿等科学家提出的第一种现代原子理论，依赖于原子量的概念来解释化学反应和化合物形成。他的工作为我们当前的化学理解奠定了基础。总之，化学原子量是一个关键概念，它连接了化学的理论与实践方面。它使科学家能够进行至关重要的计算，适用于从药物配方到环境研究的广泛应用。随着我们继续深入探索原子世界，化学原子量的重要性无疑仍将是物质及其相互作用持续探索的关键要素。