Lutetium

Lanthanide

Symbol: Lu

Atomic Number: 71

Standard State: Solid

Atomic Mass: 174.9668

Electron Configuration: [Xe]6s2 4f14 5d1

Electronegativity: 1.27

Atomic Radius: 221

Ionization Energy: 5.426

Melting Point: 1936

Boiling Point: 3675

Density: 9.84

Year Discovered: 1907