chemical element
名词 n.
英文释义
名词 n.
- Any one of the types of atom distinguished by having a certain number of protons in its nucleus.
- A chemical substance made entirely of one such type of atom; any one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.
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数据来源: Wiktionary