化学符号
化学符号以拉丁字母缩写个形式表达化学元素或官能基。化学元素个符号通常为一个或两个字母，而一些人造元素个IUPAC临时符号则使用三个字母。
元素个化学符号拉元素周期表中使用，也用来书写化学式。
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