atomic number

简明释义

原子序

英英释义

例句

1.The atomic number 原子序数 of oxygen is 8.

氧的原子序数是8。

2.The element with an atomic number 原子序数 of 6 is carbon.

原子序数为6的元素是碳。

3.In the periodic table, each element is defined by its atomic number 原子序数.

在周期表中，每个元素都由其原子序数定义。

4.Hydrogen has the lowest atomic number 原子序数 of all elements.

氢是所有元素中原子序数最低的元素。

5.To find an element's properties, you can start by looking at its atomic number 原子序数.

要查找元素的性质，可以先查看其原子序数。

作文

The concept of the atomic number is fundamental in the field of chemistry and physics. It refers to the number of protons found in the nucleus of an atom, which determines the identity of the element. For example, hydrogen has an atomic number of 1, meaning it has one proton, while carbon has an atomic number of 6, indicating it possesses six protons. This simple yet profound characteristic not only defines the element itself but also influences its chemical behavior and properties.Understanding the atomic number is crucial for students and professionals in scientific fields. It serves as a basis for the periodic table of elements, where elements are arranged in order of increasing atomic number. This organization allows scientists to predict how different elements will interact with each other in chemical reactions. For instance, elements with similar atomic numbers often exhibit similar chemical properties, leading to the formation of groups or families in the periodic table.In addition to defining the identity of an element, the atomic number also plays a significant role in understanding isotopes. Isotopes are variants of a particular chemical element that have the same number of protons but differ in the number of neutrons. For example, both carbon-12 and carbon-14 are isotopes of carbon, having the same atomic number of 6, but differing in their neutron count. This distinction is important in various applications, such as radiocarbon dating, where the ratio of carbon isotopes is used to determine the age of ancient organic materials.Furthermore, the atomic number influences the electron configuration of an atom, which in turn affects how the atom interacts with other atoms. The electrons are arranged in shells around the nucleus, and the distribution of these electrons is determined by the atomic number. This arrangement is critical in understanding chemical bonding, as elements with similar atomic numbers may form covalent or ionic bonds depending on their electron configurations. For example, sodium (with an atomic number of 11) readily loses an electron to achieve a stable configuration, while chlorine (with an atomic number of 17) tends to gain an electron, leading to the formation of sodium chloride, or table salt.The significance of the atomic number extends beyond the classroom and laboratory. In medicine, for instance, the atomic number is vital in the field of nuclear medicine, where radioactive isotopes are used for diagnosis and treatment. Understanding the atomic number helps medical professionals choose appropriate isotopes for imaging or therapy, enhancing patient care and treatment outcomes.In conclusion, the atomic number is a key concept that underpins much of modern science. Its implications stretch from the basic understanding of elements and their properties to advanced applications in technology and medicine. By grasping the importance of the atomic number, we can better appreciate the complexity and beauty of the natural world, as well as the intricate relationships between different elements and compounds. As we continue to explore the universe at the atomic level, the atomic number will remain a cornerstone of our scientific understanding, guiding research and discovery for generations to come.

“原子序数”这一概念在化学和物理学领域中是基础性的。它指的是一个原子核中质子的数量，这决定了元素的身份。例如，氢的原子序数为1，意味着它有一个质子，而碳的原子序数为6，表示它有六个质子。这一简单而深刻的特征不仅定义了元素本身，还影响其化学行为和性质。理解原子序数对科学领域的学生和专业人士至关重要。它作为元素周期表的基础，元素按原子序数的递增顺序排列。这种组织方式使科学家能够预测不同元素在化学反应中的相互作用。例如，具有相似原子序数的元素通常表现出相似的化学性质，从而形成周期表中的族或家族。除了定义元素的身份外，原子序数还在理解同位素方面发挥着重要作用。同位素是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。例如，碳-12和碳-14都是碳的同位素，具有相同的原子序数6，但中子数量不同。这一区别在各种应用中非常重要，例如放射性碳定年法，其中碳同位素的比率用于确定古代有机材料的年龄。此外，原子序数影响原子的电子配置，这又影响原子与其他原子的相互作用。电子围绕原子核排列，电子的分布由原子序数决定。这一排列对于理解化学键至关重要，因为具有相似原子序数的元素可能根据其电子配置形成共价键或离子键。例如，钠（原子序数为11）容易失去一个电子以达到稳定的配置，而氯（原子序数为17）则倾向于获得一个电子，从而形成氯化钠，即食盐。原子序数的重要性超越了课堂和实验室。在医学领域，例如，在核医学中，原子序数在放射性同位素用于诊断和治疗时至关重要。理解原子序数帮助医疗专业人员选择适当的同位素进行成像或治疗，提高患者护理和治疗效果。总之，原子序数是现代科学的一个关键概念。它的影响从对元素及其性质的基本理解延伸到技术和医学中的高级应用。通过掌握原子序数的重要性，我们可以更好地欣赏自然界的复杂性和美丽，以及不同元素和化合物之间错综复杂的关系。当我们继续在原子层面探索宇宙时，原子序数将作为我们科学理解的基石，引导研究和发现，造福后代。