| From Wikipedia, the free encyclopediaNeodymium 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. | |||||||||
Neodymium in the periodic table | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Symbol | Nd | ||||||||
| Atomic number | 60 | ||||||||
| Group | 0 | ||||||||
| Period | 6 | ||||||||
| Block | f | ||||||||
| Element category | Lanthanide | ||||||||
Physical properties | |||||||||
| Phase at STP | Solid | ||||||||
| Density | 7.01 g/cm3 | ||||||||
| Atomic weight | 144.242 u | ||||||||
| Melting point | 1297 K 1023.85 °C 1874.93 °F | ||||||||
| Boiling point | 3347 K 3073.85 °C 5564.93 °F | ||||||||
Atomic properties | |||||||||
| Electronegativity (Pauling Scale) | 1.14 | ||||||||
| Electron affinity | 184.87 kJ/mol | ||||||||
| Oxidation states | 0, +2, +3, +4 (a mildly basic oxide) | ||||||||
| Ionization energies |
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Electron configuration | |||||||||
| Elektronkonfiguration (shorthand) | [Xe] 4f4 6s2 | ||||||||
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f4 5s2 5p6 6s2 | ||||||||
| Electrons per shell | 2, 8, 18, 22, 8, 2 | ||||||||
History | |||||||||
| Discovered | 1885 | ||||||||
| Discovered by | Carl Auer von Welsbach | ||||||||