Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic transition metal, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.Symbol: Sc
Atomic number: 21
Electron configuration: Ar 3d1 4s2
Melting point: 1,541 °C
Discovered: 1879
Atomic mass: 44.955912 ± 0.000006 u
Discoverer: Lars Fredrik Nilson