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scandium    
n. 金属元素之一,符号为Sc,原子序为21

金属元素之一,符号为Sc,原子序为21

scandium
n 1: a white trivalent metallic element; sometimes classified in
the rare earth group; occurs in the Scandinavian mineral
thortveitite [synonym: {scandium}, {Sc}, {atomic number 21}]

Scandium \Scan"di*um\, n. [NL. So called because found in
Scandinavian minerals.] (Chem.)
A rare metallic element of the boron group, whose existence
was predicted under the provisional name {ekaboron} by means
of the periodic law, and subsequently discovered by spectrum
analysis in certain rare Scandinavian minerals (euxenite and
gadolinite). It has not yet been isolated. Symbol Sc. Atomic
weight 44.
[1913 Webster]


Ekabor \Ek"a*bor`\ ([e^]k"[.a]*b[=o]r`), Ekaboron \Ek"a*bo"ron\
(-b[=o]"r[o^]n), n. [G., fr. Skr. [=e]ka one G. bor, boron,
E. boron.] (Chem.)
The name given by Mendelejeff in accordance with the periodic
law, and by prediction, to a hypothetical element then
unknown, but since discovered and named {scandium}; -- so
called because it was a missing analogue of the boron group.
See {Scandium}.
[1913 Webster]


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