71Lu
Lutetium
루테튬 · ルテチウム
Lanthanide
Atomic number71
ElementLu — Lutetium
Atomic mass174.97
CategoryLanthanide
Group3
Period6
Electron config[Xe] 4f14 5d1 6s2
Shells2,8,18,32,9,2
State (RT)Solid
Melting pt1663°C
Boiling pt3402°C
Electronegativity1.27
Discovered1907
Main usesPetroleum cracking catalyst, PET scans
2 · 8 · 18 · 32 · 9 · 2
Group 3
Sc ScandiumY YttriumLa LanthanumCe CeriumPr PraseodymiumNd NeodymiumPm PromethiumSm SamariumEu EuropiumGd GadoliniumTb TerbiumDy DysprosiumHo HolmiumEr ErbiumTm ThuliumYb YtterbiumAc ActiniumTh ThoriumPa ProtactiniumU UraniumNp NeptuniumPu PlutoniumAm AmericiumCm CuriumBk BerkeliumCf CaliforniumEs EinsteiniumFm FermiumMd MendeleviumNo NobeliumLr Lawrencium