68Er
Erbium
어븀 · エルビウム
Lanthanide
Atomic number68
ElementEr — Erbium
Atomic mass167.26
CategoryLanthanide
Group3
Period6
Electron config[Xe] 4f12 6s2
Shells2,8,18,30,8,2
State (RT)Solid
Melting pt1529°C
Boiling pt2868°C
Electronegativity1.24
Discovered1843
Main usesFiber-optic amplifiers, pink glass
2 · 8 · 18 · 30 · 8 · 2
Group 3
Sc ScandiumY YttriumLa LanthanumCe CeriumPr PraseodymiumNd NeodymiumPm PromethiumSm SamariumEu EuropiumGd GadoliniumTb TerbiumDy DysprosiumHo HolmiumTm ThuliumYb YtterbiumLu LutetiumAc ActiniumTh ThoriumPa ProtactiniumU UraniumNp NeptuniumPu PlutoniumAm AmericiumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumFm FermiumMd MendeleviumNo NobeliumLr Lawrencium