Molibden
42
Mo
Grupă
6
Perioadă
5
Bloc
d
Protoni
Electroni
Neutroni
42
42
54
Proprietăți Generale
Număr atomic
42
Masă atomică
95,96
Numar de masa
96
Categorie
Metale de tranziție
Culoare
Gri
Radioactive
Nu
Din cuvântul grecesc molybdo, plumb
Structură cristalină
Corp Centrat Cubic
Istoric
Molybdenite was often confused for graphite and it was thought to contain lead.
In 1778 Swedish scientist Carl Wilhelm Scheele proved that molybdenite was not graphite nor did it contain lead.
In 1781, Scheele's friend and countryman, Peter J. Hjelm isolated the metal by using carbon and linseed oil.
In 1778 Swedish scientist Carl Wilhelm Scheele proved that molybdenite was not graphite nor did it contain lead.
In 1781, Scheele's friend and countryman, Peter J. Hjelm isolated the metal by using carbon and linseed oil.
Electroni pe nivelul de energie
2, 8, 18, 13, 1
Configurație electronică
[Kr] 4d5 5s1
Molybdenum is essential for plant foliage health
Proprietăți Fizice
Fază
Solid
Densitate
10,22 g/cm3
Punct de topire
2896,15 K | 2623 °C | 4753,4 °F
Punct de fierbere
4912,15 K | 4639 °C | 8382,2 °F
Energie de fuziune
36 kJ/mol
Energie de evaporare
600 kJ/mol
Căldură specifică
0,251 J/g·K
Abundența în scoarța Pământului
0,00011%
Abundența în Univers
5×10-7%
Numarul CAS
7439-98-7
Număr CID PubChem
23932
Proprietăți Atomice
Rază atomică
139 pm
Rază de covalență
154 pm
Electronegativitate
2,16 (Scara lui Pauling)
Potențial de ionizare
7,0924 eV
Volum molar
9,4 cm3/mol
Conductivitate termică
1,38 W/cm·K
Număr de oxidare
-2, -1, 1, 2, 3, 4, 5, 6
Aplicații
Molybdenum is used as glass furnace electrodes due to its high melting point.
The metal is also used in nuclear energy applications and for missile and aircraft parts.
Molybdenum is valuable as a catalyst in the refining of petroleum.
Molybdenum is used in small quantities to harden steel and is used in many alloys.
The metal is also used in nuclear energy applications and for missile and aircraft parts.
Molybdenum is valuable as a catalyst in the refining of petroleum.
Molybdenum is used in small quantities to harden steel and is used in many alloys.
Molybdenum is toxic in all but small quantities
Izotopi
Izotopi stabili
92Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98MoIzotopi instabili
83Mo, 84Mo, 85Mo, 86Mo, 87Mo, 88Mo, 89Mo, 90Mo, 91Mo, 93Mo, 99Mo, 100Mo, 101Mo, 102Mo, 103Mo, 104Mo, 105Mo, 106Mo, 107Mo, 108Mo, 109Mo, 110Mo, 111Mo, 112Mo, 113Mo, 114Mo, 115Mo