元素和原子是初中化学中两个重要概念，明确元素和原子的区别、联系和使用范围，对正确理解和描述物质的组成与构成很有必要。一、元素和原子的概念辨析元素是具有相同核电荷数（即核内质子数）的单核微粒（包括同类原子和离子）的总称。这里的“单核”指只含一个原子核。不同 Elements and atoms are two important concepts in junior high school chemistry. It is clear that the differences, connections, and scope of use of elements and atoms are necessary for a correct understanding and description of the composition and composition of substances. First, the concept of elemental and atomic analysis of elements is a generic term for nuclear particles (including the same type of atoms and ions) with the same nuclear charge number (ie, the number of protons in the core). Here “mononuclear” means having only one nucleus. different