periodic flow

例句：

1. 1.The periodic table of elements is a visual representation of the elements' chemical properties.
   元素周期表是元素化学性质的视觉表示。
2. 2.The periodic law states that elements with similar atomic numbers have similar properties.
   周期性律表明，具有相同原子序数的元素有相似的属性。
3. 3. The periodic table was created by the Swedish chemist Svante Arrhenius in 1869.
   1869年，瑞典化学家斯文特·阿伦尼乌斯创建了周期表。