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 | |