21Sc
Scandium
스칸듐 · スカンジウム
Transition metal
Atomic number21
ElementSc — Scandium
Atomic mass44.956
CategoryTransition metal
Group3
Period4
Electron config[Ar] 3d1 4s2
Shells2,8,9,2
State (RT)Solid
Melting pt1541°C
Boiling pt2836°C
Electronegativity1.36
Discovered1879
Main usesAerospace, sports equipment alloys
2 · 8 · 9 · 2
Group 3
Y YttriumLa LanthanumCe CeriumPr PraseodymiumNd NeodymiumPm PromethiumSm SamariumEu EuropiumGd GadoliniumTb TerbiumDy DysprosiumHo HolmiumEr ErbiumTm ThuliumYb YtterbiumLu LutetiumAc ActiniumTh ThoriumPa ProtactiniumU UraniumNp NeptuniumPu PlutoniumAm AmericiumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumFm FermiumMd MendeleviumNo NobeliumLr Lawrencium