<English>International Union of Pure and Applied Chemistry, IUPAC <Chinese>国际纯粹与应用化学联合会 ** <English>alkali metal <Chinese>碱金属 ** <English>alkaline earth metal <Chinese>碱土金属 ** <English>pnicogen <Chinese>磷属元素 ** <English>chalcogen <Chinese>硫属元素 ** <English>halogen <Chinese>卤素 ** <English>pseudohalogen <Chinese>拟卤素 ** <English>transition element <Chinese>过渡元素 ** <English>inner transition element <Chinese>内过渡元素 ** <English>rare element <Chinese>稀有元素 ** <English>rare me
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