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Palladium (Pd)

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


book | by Dr. Radut