isotopic weight

简明释义

同位素的原子量

英英释义

例句

1.When analyzing a compound, scientists often look at the isotopic weight 同位素质量 to understand its composition better.

在分析化合物时，科学家通常会查看isotopic weight 同位素质量 以更好地理解其成分。

2.Researchers used the isotopic weight 同位素质量 to trace the origins of ancient water sources.

研究人员使用isotopic weight 同位素质量 来追踪古代水源的来源。

3.In nuclear chemistry, the isotopic weight 同位素质量 plays a crucial role in determining the stability of isotopes.

在核化学中，isotopic weight 同位素质量 在确定同位素的稳定性方面起着至关重要的作用。

4.The isotopic weight 同位素质量 of carbon-12 is exactly 12 atomic mass units by definition.

根据定义，碳-12的isotopic weight 同位素质量 正好是12个原子质量单位。

5.The calculation of the average atomic mass requires knowing the isotopic weight 同位素质量 of each isotope present in the sample.

计算平均原子质量需要知道样品中每种同位素的isotopic weight 同位素质量。

作文

The concept of isotopic weight is fundamental in the field of chemistry and physics, particularly when discussing the properties of elements and their isotopes. Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons. This variation in neutron count leads to differences in mass, which is where isotopic weight comes into play. The isotopic weight refers to the weighted average of the masses of an element's isotopes, taking into account their relative abundances in nature. For instance, consider the element carbon, which has two stable isotopes: carbon-12 and carbon-13. Carbon-12 has an atomic mass of approximately 12 atomic mass units (amu), while carbon-13 has a slightly higher mass of about 13 amu. In nature, about 98.9% of carbon exists as carbon-12, while only about 1.1% is carbon-13. To calculate the isotopic weight of carbon, we multiply each isotope's mass by its relative abundance and sum these values. This results in a isotopic weight of approximately 12.01 amu for carbon, which is the value you will find on the periodic table.Understanding isotopic weight is not only crucial for academics but also has practical applications in various fields. For example, in geology, scientists use isotopic weights to date rocks and fossils through a method known as radiometric dating. By analyzing the ratios of isotopes within a sample, they can determine its age. Similarly, in medicine, isotopes are used in diagnostic imaging and treatment, where knowing the isotopic weight helps in calculating dosages and understanding how isotopes behave within the body.Moreover, the study of isotopic weight contributes to our understanding of environmental science. Isotope analysis can reveal information about climate change and pollution sources. For instance, scientists can track the origins of greenhouse gases by examining the isotopic composition of carbon dioxide in the atmosphere. This approach helps in formulating strategies to combat climate change effectively.In conclusion, the term isotopic weight encapsulates a vital aspect of how we understand the physical world around us. It bridges theoretical concepts with real-world applications, influencing fields ranging from chemistry to environmental science. As we continue to explore the intricacies of isotopes and their weights, we deepen our comprehension of elemental behavior and its implications for technology, health, and the environment.

“同位素重量”这一概念在化学和物理领域中是基础性的，特别是在讨论元素及其同位素的性质时。同位素是某一特定化学元素的变体，它们具有相同数量的质子，但中子数量不同。这种中子数量的变化导致质量的差异，这就是“同位素重量”的作用所在。“同位素重量”指的是一个元素的同位素质量的加权平均值，考虑到它们在自然界中的相对丰度。例如，考虑元素碳，它有两个稳定的同位素：碳-12和碳-13。碳-12的原子质量约为12个原子质量单位（amu），而碳-13的质量稍高，约为13 amu。在自然界中，约98.9%的碳以碳-12的形式存在，而只有约1.1%是碳-13。要计算碳的“同位素重量”，我们将每个同位素的质量乘以其相对丰度并将这些值相加。这导致碳的“同位素重量”约为12.01 amu，这是你在周期表上找到的值。理解“同位素重量”不仅对学术界至关重要，还在各个领域中具有实际应用。例如，在地质学中，科学家使用同位素重量通过一种称为放射性定年的方法给岩石和化石定年。通过分析样本中同位素的比率，他们可以确定其年龄。同样，在医学中，同位素被用于诊断成像和治疗，了解“同位素重量”有助于计算剂量和理解同位素在体内的行为。此外，“同位素重量”的研究有助于我们理解环境科学。同位素分析可以揭示气候变化和污染源的信息。例如，科学家可以通过检查大气中二氧化碳的同位素组成来追踪温室气体的来源。这种方法有助于制定有效的应对气候变化的策略。总之，“同位素重量”这一术语概括了我们理解周围物理世界的重要方面。它将理论概念与现实应用联系起来，影响从化学到环境科学的各个领域。随着我们继续探索同位素及其重量的复杂性，我们加深了对元素行为及其对技术、健康和环境影响的理解。