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单词 ELEMENT
释义

1. In General, it is a term used to describe a basic principle or a fundamental part. 2. In Chemistry and Physics, it is a term that categorizes unique, distinguishable, basic matter. In combination or alone, they make up all substances known to man. Each element is comprised solely of atoms. Combined elements compose a molecule. Elements have 3 groups: metals, nonmetals, and metalloids (weakly metallic). Currently, 110 elements are known. 81 are stable, non-radioactive. 92 of the 110 occur naturally, while the other 18 are synthesized in particle accelerators. Theoretically, many more are possible,

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