Neodim
60
Nd
Grupă
n/a
Perioadă
6
Bloc
f
Protoni
Electroni
Neutroni
60
60
84
Proprietăți Generale
Număr atomic
60
Masă atomică
144,242
Numar de masa
144
Categorie
Lantanide
Culoare
Argint
Radioactive
Nu
Din cuvântul grecesc neos ce înseamnă nou, și didymos, geamăn (noul geamăn)
Structură cristalină
Sistemul Hexagonal
Istoric
Neodymium was first identified in 1885, in Vienna, by the Austrian chemist Carl Auer von Welsbach.
It was discovered in didymium, a substance incorrectly said by Carl Gustav Mosander to be a new element in 1841.
Pure neodymium metal was isolated in 1925.
It was discovered in didymium, a substance incorrectly said by Carl Gustav Mosander to be a new element in 1841.
Pure neodymium metal was isolated in 1925.
Electroni pe nivelul de energie
2, 8, 18, 22, 8, 2
Configurație electronică
[Xe] 4f4 6s2
Most of the world's neodymium is mined in China
Proprietăți Fizice
Fază
Solid
Densitate
7,007 g/cm3
Punct de topire
1297,15 K | 1024 °C | 1875,2 °F
Punct de fierbere
3347,15 K | 3074 °C | 5565,2 °F
Energie de fuziune
7,1 kJ/mol
Energie de evaporare
285 kJ/mol
Căldură specifică
0,19 J/g·K
Abundența în scoarța Pământului
0,0033%
Abundența în Univers
1×10-6%
Numarul CAS
7440-00-8
Număr CID PubChem
23934
Proprietăți Atomice
Rază atomică
181 pm
Rază de covalență
201 pm
Electronegativitate
1,14 (Scara lui Pauling)
Potențial de ionizare
5,525 eV
Volum molar
20,6 cm3/mol
Conductivitate termică
0,165 W/cm·K
Număr de oxidare
2, 3
Aplicații
Neodymium is used to make specialized goggles for glass blowers.
Neodymium magnets appear in products such as microphones, professional loudspeakers, in-ear headphones, guitar and bass guitar pick-ups and computer hard disks.
Glass containing neodymium can be used as a laser material to produce coherent light.
Neodymium magnets appear in products such as microphones, professional loudspeakers, in-ear headphones, guitar and bass guitar pick-ups and computer hard disks.
Glass containing neodymium can be used as a laser material to produce coherent light.
Neodymium is considered to be moderately toxic
Izotopi
Izotopi stabili
142Nd, 143Nd, 145Nd, 146Nd, 148NdIzotopi instabili
124Nd, 125Nd, 126Nd, 127Nd, 128Nd, 129Nd, 130Nd, 131Nd, 132Nd, 133Nd, 134Nd, 135Nd, 136Nd, 137Nd, 138Nd, 139Nd, 140Nd, 141Nd, 144Nd, 147Nd, 149Nd, 150Nd, 151Nd, 152Nd, 153Nd, 154Nd, 155Nd, 156Nd, 157Nd, 158Nd, 159Nd, 160Nd, 161Nd