元素周期表
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前字五行属什么几画啊？前字五行属什么几画几画！
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现代化学里的元素周期表是1869年俄国化学家门捷列夫首创的。一开始是将63种元素依照相对原子质量大小以表的形式排列，后来新增到 118种元素，这么多新的元素如何用汉字命名?新元素如…
