lutetium

Symbol: Lu
Atomic number: 71
Atomic weight: 174.967
Group: 3
Group name: (none)
Period: 6
Block: d
CAS ID: 7439-94-3
Shell structure: 2.8.18.32.9.2
Electron configuration: [Xe].4f14.5d1.6s2
State: |standardstate|
Melting point: 1925 [or 1652 °C (3006 °F)]
Boiling point: 3675 [or 3402 °C (6156 °F)]
Ionization energy/kJ per mol: 523.5
Common oxidation states: 3
Pauling electronegativity: 1.27