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scandium |
4 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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. From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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}. From WordNet r 1.6 [wn]: scandium n : a white trivalent metallic element; sometimes classified in the rare earth group occurs in the Scandinavian mineral thortveitite [syn: {Sc}, {atomic number 21}] From Elements database 20001107 [elements]: scandium Symbol: Sc Atomic number: 21 Atomic weight: 44.956 Rare soft silvery metallic element belonging to group 3 of the periodic table. There are ten isotopes, nine of which are radioactive and have short half-lives. Predicted in 1869 by Mendeleev, isolated by Nilson in 1879.
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