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60Nd144.242
Neodymium
LanthanideNeodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach.
Phase: SolidAppearance: silvery white
2, 8, 18, 22, 8, 2
Physical Properties
Atomic Mass144.2423 u
Density7.01 g/cm³
Melting Point1297 K
Boiling Point3347 K
Molar Heat27.45 J/(mol·K)
Period6
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f4
Semantic Config[Xe] 4f4 6s2
Shells2, 8, 18, 22, 8, 2
Electron Affinity184.87 kJ/mol
Electronegativity1.14
Ionization Energies
IE1: 533.1 kJ/molIE2: 1040 kJ/molIE3: 2130 kJ/molIE4: 3900 kJ/mol
Discovery
Discovered byCarl Auer von Welsbach