Elements and inorganic compounds
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相关词汇:
Periodic table of the elements 元素周期表; group 族; block 区; Hygrogen 氢
Carbon 碳; Nitrogen 氮; Oxygen 氧; Sodium 钠; Magnesium镁
Phosphorus 磷; Sulphur 硫; Chlorine 氯; Calcium 钙; Iron 铁
Copper 铜; Zinc 锌; Lead 铅; Silver 银; Gold 金