Molybdenum

42
Mo
Gruppe
6
Periode
5
Blok
d
Protons
Electrons
Neutrons
42
42
54
General Properties
Atomnummer
42
Atommasse
95,96
Mass Number
96
Kategori
Overgangsmetaller
Farve
Grå
Radioactive
Nej
From the Greek word molybdo, lead
Krystalstruktur
Rumcentreret Kubisk
History
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.
Elektroner i hver skal
2, 8, 18, 13, 1
Elektronkonfiguration
[Kr] 4d5 5s1
Mo
Molybdenum is essential for plant foliage health
Physical Properties
Tilstandsform
Fast stof
Massefylde
10,22 g/cm3
Smeltepunkt
2896,15 K | 2623 °C | 4753,4 °F
Kogepunkt
4912,15 K | 4639 °C | 8382,2 °F
Smeltevarme
36 kJ/mol
Fordampningsvarme
600 kJ/mol
Varmefylde
0,251 J/g·K
Abundance in Earth's crust
0,00011%
Abundance in Universe
5×10-7%
Molybdenum
Billede akkrediteringer: Images-of-elements
Molybdenum with rough, oxidized surface
CAS Number
7439-98-7
PubChem CID Number
23932
Atomic Properties
Atomradius
139 pm
Kovalent radius
154 pm
Elektronegativitet
2,16 (Paulings skala)
Ionization Potential
7,0924 eV
Atomic Volume
9,4 cm3/mol
Varmeledningsevne
1,38 W/cm·K
Oxidationstrin
-2, -1, 1, 2, 3, 4, 5, 6
Applications
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.
Molybdenum is toxic in all but small quantities
Isotoper
Stable Isotopes
92Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo
Unstable Isotopes
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