71Lu

Lutetium

Lanthanide

Lutetium (Lu) is element 71, a lanthanide, in period 6 and group 3 of the periodic table. Its standard atomic weight is 174.967, it melts at 1663 °C and boils at 3402 °C. Discovered by Georges Urbain, 1907.

Atomic Number71

SymbolLu

NameLutetium

Atomic Weight174.967 u

CategoryLanthanide

Period6

Group3

Melting Point1663 °C

Boiling Point3402 °C

Density9.84 g/cm³

Electron Config[Xe] 4f14 5d1 6s2

Discovered ByGeorges Urbain, 1907

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