“rare earth element”的概念、定义、翻译、参考文献-科学参考

　

单词	rare earth element
释义	rare earth element Encyclopedia 理学稀土元素释 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）。 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
随便看	ancient tea set ancient thread stitching ancient timers Ancient Tombs at Baling Hill Ancient Tombs at Leigudun Ancient Tombs at Liudingshan Ancient Tombs at Longtoushan Ancient Towpath ancient tree group in Eryuan County ancient trees in Beijing center Ancient Trees in Mount Tianmu ancient trees in the Ming Tombs, Changping ancient trees in the Tanzhe Temple ancient trees in the Temple of Heaven Park ancient trees in Xiangshan Park Ancient Villages in Southern Anhui–Xidi and Hongcun World Culture Heritage ancient water conservancy projects in the Mesopotamia ancient water conservancy projects in the Nile valley Ancient Water Distribution Project ancient water-lifting machines ancient welding technology Ancient Well Irrigation Project ancient west asia architecture ancient winch ancient windmill

　

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