Scandium

4 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [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.