McGraw-Hill's AccessScience

Log In

< Back


Atomic Number	60

Atomic Symbol	Nd

Atomic Weight	144.24 amu

Group	Rare Earth (Lanthanide Series)

Form	Solid

Density @ STP	7.01 g/cm³

Melting Point	1021 °C (1869.8 °F, 1294.15 °K)

Boiling Point	3074 °C (5565.2 °F, 3347.15 °K)

Heat of Fusion	7.14 kJ/mol

Heat of Vaporization	285 kJ/mol

First Ionization Potential	5.5250 eV

Electronegativity (on Pauling scale	1.14

Specific Heat Capacity	0.190 J/g K

Ground State Electron Configuration	4f⁴ 5s² 5p⁶ 6s²

Oxidation State(s)	+3

Stable Isotopes and Natural Abundance on Earth	¹⁴²Nd, 27.13%; ¹⁴³Nd, 12.18%; ¹⁴⁴Nd, 23.80%; ¹⁴⁵Nd, 8.30%; ¹⁴⁶Nd, 17.19%; ¹⁴⁸Nd, 5.76%; ¹⁵⁰Nd, 5.64%

Atomic Radius	206 pm

Crystal Structure	Hexagonal

Discovered by	Auer von Welsbach, 1885