isotopic number

简明释义

中子过剩

英英释义

例句

1.Different elements can have the same isotopic number (同位素数), leading to confusion in chemical reactions.

不同的元素可以有相同的isotopic number（同位素数），这可能在化学反应中导致混淆。

2.In nuclear medicine, understanding the isotopic number (同位素数) of certain isotopes can help in diagnosis.

在核医学中，了解某些同位素的isotopic number（同位素数）可以帮助诊断。

3.The isotopic number (同位素数) of carbon-14 is essential for radiocarbon dating.

碳-14的isotopic number（同位素数）对于放射性碳定年至关重要。

4.The atomic mass of an element is often influenced by its isotopic number (同位素数).

一个元素的原子质量通常受到其isotopic number（同位素数）的影响。

5.The isotopic number (同位素数) helps scientists identify the origin of a sample.

isotopic number（同位素数）帮助科学家识别样本的来源。

作文

The concept of isotopes is fundamental in the field of chemistry and physics. An isotope refers to 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 atomic mass, which is where the term isotopic number comes into play. The isotopic number is defined as the total number of protons and neutrons present in the nucleus of an atom. For example, carbon has several isotopes, including carbon-12 and carbon-14. In carbon-12, there are 6 protons and 6 neutrons, giving it an isotopic number of 12. In contrast, carbon-14 has 6 protons and 8 neutrons, resulting in an isotopic number of 14.Understanding the isotopic number is crucial for various applications, including radiocarbon dating, medical imaging, and nuclear energy production. For instance, in radiocarbon dating, scientists measure the amount of carbon-14 remaining in an organic sample to determine its age. Since carbon-14 is unstable and decays over time, knowing its isotopic number helps researchers estimate how long it has been since the organism died.Another important application of isotopes is in the field of medicine. Certain isotopes are used in diagnostic imaging techniques, such as PET scans, where radioactive isotopes are introduced into the body. The isotopic number of these isotopes is essential for understanding their behavior and interactions within biological systems. By analyzing the emitted radiation, doctors can obtain detailed images of organs and tissues, aiding in the diagnosis of various conditions.Moreover, isotopes play a significant role in nuclear energy. Uranium, for example, has isotopes like uranium-235 and uranium-238, each with different isotopic numbers. The ability to harness energy from these isotopes is what makes nuclear power a viable energy source. Understanding the isotopic number allows scientists to determine the suitability of specific isotopes for nuclear reactions, which is critical for energy production and safety measures in nuclear facilities.In addition to practical applications, the study of isotopes and their isotopic numbers provides insights into fundamental scientific principles. Isotopes can reveal information about the formation of elements in stars, the age of geological formations, and even the history of climate change on Earth. By examining the ratios of different isotopes in samples, researchers can make inferences about past events and processes that have shaped our planet.In conclusion, the isotopic number is a key concept in understanding isotopes and their significance across various scientific disciplines. From dating ancient artifacts to advancing medical technology and exploring the universe, the implications of isotopes and their isotopic numbers are vast and impactful. As we continue to explore the intricacies of atomic structure, the importance of the isotopic number will only grow, enhancing our understanding of the natural world and enabling advancements in multiple fields of study.

同位素的概念在化学和物理学领域是基础性的。同位素是指某个化学元素的变体，它们具有相同数量的质子，但中子数量不同。这种中子数的变化导致原子质量的差异，这就是术语同位素数的由来。同位素数被定义为原子核中质子和中子的总数。例如，碳有几种同位素，包括碳-12和碳-14。在碳-12中，有6个质子和6个中子，使其同位素数为12。相比之下，碳-14有6个质子和8个中子，因此其同位素数为14。理解同位素数对于许多应用至关重要，包括放射性碳定年、医学成像和核能生产。例如，在放射性碳定年中，科学家测量有机样本中剩余的碳-14量，以确定其年龄。由于碳-14不稳定并随着时间衰变，了解其同位素数可以帮助研究人员估算生物体死亡以来经过的时间。同位素在医学领域的另一个重要应用是某些同位素被用于诊断成像技术，例如PET扫描，其中放射性同位素被引入体内。这些同位素的同位素数对于理解它们在生物系统中的行为和相互作用至关重要。通过分析发射的辐射，医生可以获得器官和组织的详细图像，帮助诊断各种疾病。此外，同位素在核能中也发挥着重要作用。例如，铀有铀-235和铀-238等同位素，每种同位素都有不同的同位素数。利用这些同位素释放能量是核电成为可行能源的原因。理解同位素数使科学家能够确定特定同位素进行核反应的适用性，这对于能源生产和核设施的安全措施至关重要。除了实际应用外，同位素及其同位素数的研究还提供了对基本科学原理的深入理解。同位素可以揭示关于恒星中元素形成、地质形成的年代以及地球气候变化历史的信息。通过检查样本中不同同位素的比率，研究人员可以推断出塑造我们星球的过去事件和过程。总之，同位素数是理解同位素及其在各科学学科中重要性的关键概念。从古代文物的定年到推动医疗技术和探索宇宙，同位素及其同位素数的影响广泛而深远。随着我们不断探索原子结构的复杂性，同位素数的重要性只会增加，从而增强我们对自然世界的理解，并推动多个研究领域的进步。