| Ordnungszahl: |
42 |
| Name: |
Molybdenum |
| Namensursprung: |
Greek: molybdos (lead). |
| Entdeckung: |
1778 by Carl Wilhelm Scheele in Sweden |
| Beschreibung: |
Hard, silvery-white metal. |
| Vorkommen: |
Found in the minerals molybdenite (MoS2) and wulfenite (MoO4Pb). |
| Verwendung: |
Its alloys are used in aircraft, missiles, and protective coatings in boiler plate. |
| Gruppe: |
Transition Metal |
| Atomgewicht: |
95.94 |
| Schmelzpunkt: |
2617°C |
| Siedepunkt: |
4612°C |
| Dichte bei 293 K: |
10.2 g/cm³ |
| Aggregatszustand bei Raumtemperatur: |
Solid |
| Schalen: |
2,8,18,13,1 |
| Orbitale: |
[Kr] 4d5 5s1 |
| Valenzen: |
2,3,6 |
| 1. Ionisierungs- potential: |
7.0924 V |
| 2. Ionisierungs- potential: |
16.461 V |
| 3. Ionisierungs- potential: |
27.16 V |
| Atomradius: |
2.01 Å |
| Spezifische Wärme: |
0.25 J/gK |
| Verdampfungswärme: |
598.0 kJ/mol |
| Schmelzwärme: |
32.0 kJ/mol |
| Thermischer Ausdehnungskoeffizient: |
4.8 10-6 K-1 |
| Röntgenemission Energie / Wellenlänge: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| eV |
17444.8 |
19608.9 |
2293.24 |
2394.89 |
0 |
0 |
|
|
|
| Å |
0.71073 |
0.63229 |
5.40656 |
5.17708 |
0 |
0 |
|
|
|
|
| Röntgenabsorption Energie / Wellenlänge: |
| |
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
| eV |
20000 |
2866 |
2626 |
2521 |
0 |
0 |
0 |
0 |
228 |
| Å |
0.61992 |
4.32608 |
4.72145 |
4.9181 |
0 |
0 |
0 |
0 |
54.3796 |
|
| Röntgen Fluoreszenz Ausbeute: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| |
76.4% |
0% |
3.9% |
0% |
0% |
0% |
|
|
|
|
| Nuklide: |
| |
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
| Mo91 |
0% |
91 |
9/2 |
15.5m |
β+,EC |
| Mo92 |
14.84% |
91.9068 |
0 |
|
Stable |
| Mo93 |
0% |
92.9062 |
5/2 |
~3.5E3y |
EC |
| Mo94 |
9.25% |
93.9051 |
0 |
|
Stable |
| Mo95 |
15.92% |
94.9058 |
5/2 |
|
Stable |
| Mo96 |
16.68% |
95.9047 |
0 |
|
Stable |
| Mo97 |
9.55% |
96.906 |
5/2 |
|
Stable |
| Mo98 |
24.13% |
97.9054 |
0 |
|
Stable |
| Mo99 |
0% |
99 |
1 |
2.7476d |
β-,β- |
| Mo100 |
9.63% |
97.9075 |
0 |
|
Stable |
| Mo101 |
0% |
101 |
1/2 |
14.6m |
β- |
|
