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稀土元素
释义
稀土元素
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稀土元素
释
rare earth element
稀土元素
元素周期表ⅢB族中原子序数为21、39和57~71的17种化学元素的总称。稀土元素的化学符号用RE代表。又称稀土金属。包括钪Sc、钇Y、镧La、铈Ce、镨Pr、钕Nd、钷Pm、钐Sm、铕Eu、钆Gd、铽Tb、镝Dy、钬Ho、铒Er、铥Tm、镱Yb、镥Lu。其中57~71号元素称为镧系元素,位于元素周期表最下方的f区。从镧到铕为铈组(轻稀土),从钆到镥及钇为钇组(重稀土)。
Astronomy
rare-earth element
稀土元素
Chemistry
>无机化学>无机化学基本概念与无机化合物>释义
rare earth element
稀土元素
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