71 Lu 174.96681

Lutetium

LANTHANIDE

Phase: Solid

Discovered: Georges Urbain

Block: D

Summary

Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.

Appearance: silvery white

Source: Wikipedia

Physical Properties

Atomic Mass 174.96681 u

Density 9.841 g/cm³

Melting Point 1925 K

Boiling Point 3675 K

Molar Heat 26.86 J/(mol·K)

Electron Affinity 33.4 kJ/mol

Ionization Energies

1^st: 523.5 kJ/mol

2^nd: 1340 kJ/mol

3^rd: 2022.3 kJ/mol

4^th: 4370 kJ/mol

5^th: 6445 kJ/mol