| Ordnungszahl: |
46 |
| Name: |
Palladium |
| Namensursprung: |
Named after the asteroid, Pallas, discovered in 1803. |
| Entdeckung: |
1803 by William Wollaston in England |
| Beschreibung: |
Soft, malleable, ductile, silvery-white metal. |
| Vorkommen: |
Obtained with platinum, nickel, copper and mercury ores. |
| Verwendung: |
Used as a substitue for silver in dental items and jewelry. The pure metal is used as the delicate mainsprings in analog wristwatches. Also used in surgical instruments and as catalyst . |
| Gruppe: |
Transition Metal |
| Atomgewicht: |
106.42 |
| Schmelzpunkt: |
1552°C |
| Siedepunkt: |
2940°C |
| Dichte bei 293 K: |
12.02 g/cm³ |
| Aggregatszustand bei Raumtemperatur: |
Solid |
| Schalen: |
2,8,18,18 |
| Orbitale: |
[Kr] 4d10 |
| Valenzen: |
2,3,4 |
| 1. Ionisierungs- potential: |
8.3369 V |
| 2. Ionisierungs- potential: |
19.63 V |
| 3. Ionisierungs- potential: |
32.93 V |
| Atomradius: |
1.79 Å |
| Spezifische Wärme: |
0.24 J/gK |
| Verdampfungswärme: |
357.0 kJ/mol |
| Schmelzwärme: |
17.60 kJ/mol |
| Thermischer Ausdehnungskoeffizient: |
11.8 10-6 K-1 |
| Röntgenemission Energie / Wellenlänge: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| eV |
21125.5 |
23819.5 |
2838.71 |
2990.32 |
0 |
0 |
|
|
|
| Å |
0.58689 |
0.52052 |
4.36767 |
4.14623 |
0 |
0 |
|
|
|
|
| Röntgenabsorption Energie / Wellenlänge: |
| |
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
| eV |
24350 |
3605 |
3331 |
3174 |
0 |
0 |
0 |
0 |
335 |
| Å |
0.50918 |
3.43926 |
3.72217 |
3.90628 |
0 |
0 |
0 |
0 |
37.0106 |
|
| Röntgen Fluoreszenz Ausbeute: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| |
81.8% |
0% |
5.8% |
0% |
0% |
0% |
|
|
|
|
| Nuklide: |
| |
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
| Pd102 |
0.96% |
101.906 |
0 |
|
Stable |
| Pd103 |
0% |
103 |
5/2 |
16.99d |
EC,EC |
| Pd104 |
10.97% |
103.904 |
0 |
|
Stable |
| Pd105 |
22.23% |
104.905 |
5/2 |
|
Stable |
| Pd106 |
27.33% |
105.904 |
0 |
|
Stable |
| Pd107 |
0% |
107 |
5/2 |
6.5E06y |
β- |
| Pd108 |
26.71% |
107.904 |
0 |
|
Stable |
| Pd109 |
0% |
109 |
5/2 |
13.5h |
β-,β- |
| Pd110 |
11.81% |
109.905 |
0 |
|
Stable |
|
