Neodymium ([Xe]4f⁴6s²) (CAS 7440-00-8) is a soft, malleable, silvery-white metal that becomes yellowish when exposed to air. It is one of the more reactive rare earth metals. Neodymium quickly tarnishes in air, forming an oxide that spalls off exposing fresh metal to further oxidation. It has a high electrical resistivity and is paramagnetic.

Lanthanide Salts > Metal Alloys>

Phase at STP: Solid

Common Oxidation States: +3

Number of Valence Electrons: 6

Electronegativity (Pauling): 1.2

First Ionization Energy: 145 kcal/mole

Covalent Radius: 1.64 Angstroms

Melting Point: 1021°C

Boiling Point: 3074°C

Density: 7.00 g/cm³

Crystal Structure: Hexagonal

Neodymium (Nd)