Neodymium (Nd)

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

SymbolNd
Atomic number60
Group0
Period6
Blockf
Element categoryLanthanide

Physical properties

Phase at STPSolid
Density7.01 g/cm3
Atomic weight144.242 u
Melting point1297 K
1023.85 °C
1874.93 °F
Boiling point3347 K
3073.85 °C
5564.93 °F

Atomära egenskaper

Electronegativity (Pauling Scale)1.14
Electron affinity184.87 kJ/mol
Ionization energies
1533.1 kJ/mol
2 1040 kJ/mol
3 2130 kJ/mol
4 3900 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f4 5s2 5p6 6s2
Electrons per shell2, 8, 18, 22, 8, 2

History

Discovered1885
Discovered byCarl Auer von Welsbach