Molybden

42
Mo
Grupp
6
Period
5
Block
d
Protoner
Electrons
Neutroner
42
42
54
Generella Egenskaper
Atomnummer
42
Atommassa
95,96
Mass Number
96
Kategori
Övergångsmetaller
Färg
Grå
Radioaktiv
Nej
From the Greek word molybdo, lead
Kristallstruktur
Rymdcentrerat kubisk
Historia
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 per skal
2, 8, 18, 13, 1
Elektronkonfiguration
[Kr] 4d5 5s1
Mo
Molybdenum is essential for plant foliage health
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
10,22 g/cm3
Smältpunkt
2896,15 K | 2623 °C | 4753,4 °F
Kokpunkt
4912,15 K | 4639 °C | 8382,2 °F
Smältvärme
36 kJ/mol
Ångbildningsvärme
600 kJ/mol
Specifik värmekapacitet
0,251 J/g·K
Abundance in Earth's crust
0,00011%
Abundance in Universe
5×10-7%
Molybdenum
Bildkrediter: Images-of-elements
Molybdenum with rough, oxidized surface
CAS Number
7439-98-7
PubChem CID Number
23932
Atomära Egenskaper
Atomradie
139 pm
Kovalent radie
154 pm
Elektronegativitet
2,16 (Paulingskalan)
Jonisationspotential
7,0924 eV
Molvolym
9,4 cm3/mol
Värmeledningsförmåga
1,38 W/cm·K
Oxidationstillstånd
-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
Stabila isotoper
92Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo
Instabila isotoper
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