periodical table

简明释义

周期表

英英释义

例句

1.Each element in the periodic table (元素周期表) has a unique atomic symbol.

每个元素在元素周期表中都有一个独特的原子符号。

2.The periodic table (元素周期表) organizes all known elements based on their atomic number.

在元素周期表中，所有已知元素根据其原子序数进行组织。

3.The periodic table (元素周期表) helps scientists predict the behavior of elements during chemical reactions.

元素周期表帮助科学家预测元素在化学反应中的行为。

4.Students are required to memorize the first 20 elements of the periodic table (元素周期表) for the exam.

学生们需要记住考试中前20个元素的元素周期表。

5.In chemistry class, we often refer to the periodic table (元素周期表) to understand the properties of different elements.

在化学课上，我们经常提到元素周期表来理解不同元素的性质。

作文

The periodical table is an essential tool in the field of chemistry that organizes all known chemical elements in a systematic way. It was first created by Dmitri Mendeleev in 1869, and it has undergone several modifications since its inception. The periodical table is not just a mere list of elements; it provides valuable information about their properties, behaviors, and relationships with one another. At its core, the periodical table is arranged in rows called periods and columns known as groups or families. Each element is represented by its chemical symbol, atomic number, and often its atomic weight. The arrangement of elements in the periodical table reflects their atomic structure and helps predict their chemical behavior. For instance, elements in the same group tend to exhibit similar chemical properties because they have the same number of electrons in their outer shell.One of the most fascinating aspects of the periodical table is its ability to convey trends among the elements. As you move from left to right across a period, the atomic number increases, and typically, elements become less metallic and more non-metallic. Similarly, as you move down a group, the elements generally become more reactive. This systematic organization allows chemists to make educated guesses about the properties of newly discovered elements based on their position in the periodical table.In addition to its practical applications in chemistry, the periodical table also holds significant historical and educational value. It represents a milestone in scientific discovery and understanding. The journey of developing the periodical table reflects humanity's quest for knowledge about the natural world. Each element tells a story of discovery, from the ancient alchemists seeking to transform base metals into gold to modern scientists synthesizing new elements in laboratories.Furthermore, the periodical table serves as an educational tool that introduces students to the world of chemistry. By learning about the periodical table, students can gain insight into the building blocks of matter. It encourages curiosity and exploration, prompting young minds to ask questions about how elements interact and combine to form compounds. In conclusion, the periodical table is much more than a chart of elements; it is a gateway to understanding the complexities of chemistry and the universe. Its structure allows for the classification of elements based on their properties, while its historical significance marks a pivotal point in scientific advancement. Whether one is a student, a teacher, or a seasoned chemist, the periodical table remains a vital resource in the pursuit of knowledge. As we continue to explore the mysteries of the universe, the periodical table will undoubtedly play a crucial role in our discoveries and innovations.

元素周期表是化学领域中一个重要的工具，它以系统的方式组织所有已知的化学元素。它最早由德米特里·门捷列夫于1869年创建，自那时以来经历了几次修改。元素周期表不仅仅是一个元素的简单列表；它提供了有关元素性质、行为和相互关系的宝贵信息。元素周期表的核心是按行（称为周期）和列（称为族或家族）排列的。每个元素都用其化学符号、原子序数以及通常的原子量表示。元素在元素周期表中的排列反映了它们的原子结构，并有助于预测它们的化学行为。例如，同一族中的元素往往表现出相似的化学性质，因为它们的外层电子数相同。元素周期表中最迷人的方面之一是它能传达元素之间的趋势。当你从左到右移动一个周期时，原子序数增加，通常元素变得更少金属性而更具非金属性。同样，当你向下移动一个族时，元素通常变得更具反应性。这种系统的组织使化学家能够根据元素在元素周期表中的位置对新发现的元素的性质做出合理的猜测。除了在化学中的实际应用，元素周期表还具有重要的历史和教育价值。它代表了科学发现和理解的一个里程碑。发展元素周期表的过程反映了人类对自然世界知识的探索。从古代炼金术士试图将基本金属转化为黄金，到现代科学家在实验室中合成新元素，这一切都讲述了一个发现的故事。此外，元素周期表作为一种教育工具，引导学生进入化学的世界。通过学习元素周期表，学生可以深入了解物质的基本构件。它激发好奇心和探索精神，促使年轻的头脑提出关于元素如何相互作用和结合形成化合物的问题。总之，元素周期表不仅仅是一张元素的图表；它是理解化学和宇宙复杂性的门户。它的结构允许根据元素的性质对其进行分类，而它的历史意义标志着科学进步的关键点。无论是学生、教师还是资深化学家，元素周期表仍然是获取知识的重要资源。在我们继续探索宇宙的奥秘时，元素周期表无疑将在我们的发现和创新中发挥关键作用。