|a rare light silvery-white metallic element occurring in minute quantities in numerous minerals. Symbol: Sc; atomic no: 21; atomic wt: 44.955910; valency: 3; relative density: 2.989; melting pt: 1541°C; boiling pt: 2836°C|
|[C19: from New Latin, from Latin Scandia Scandinavia, where it was discovered]|
scandium scan·di·um (skān'dē-əm)
A highly reactive metallic element found in various rare minerals and separated as a byproduct in the processing of certain uranium ores. Atomic number 21; atomic weight 44.956; melting point 1,541°C; boiling point 2,830°C; specific gravity 2.99; valence 3.
|scandium (skān'dē-əm) Pronunciation Key
A soft, silvery, very lightweight metallic element that is found in various rare minerals and is a byproduct in the processing of certain uranium ores. It has a high melting point and is used to make high-intensity lights. Atomic number 21; atomic weight 44.956; melting point 1,540°C; boiling point 2,850°C; specific gravity 2.99; valence 3. See Periodic Table.
((Sc), chemical element, rare-earth metal of transition Group IIIb of the periodic table. Scandium is a silvery-white, rather soft metal. After Dmitry Ivanovich Mendeleyev predicted (1871) its existence, tentatively calling it ekaboron, Lars Fredrik Nilson discovered (1879) its oxide, scandia, in the rare-earth minerals gadolinite and euxenite, and Per Teodor Cleve (later in 1879) identified scandium with the hypothetical ekaboron.
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