Rhodium
45
Rh
Gruppe
9
Periode
5
Block
d
Protonen
Elektronen
Neutronen
45
45
58
Generelle Eigenschaften
Ordnungszahl
45
Atommasse
102,9055
Massenzahl
103
Kategorie
Übergangsmetalle
Farbe
Silber
Radioaktiv
Nein
Aus dem Griechischen rhodon (Rose)
Kristallstruktur
Kubisch flächenzentriert
Geschichte
Rhodium was discovered in 1803 by William Hyde Wollaston in London.
He used crude platinum ore presumably obtained from South America.
The introduction of the three way catalytic converter by Volvo in 1976 increased the demand for rhodium.
He used crude platinum ore presumably obtained from South America.
The introduction of the three way catalytic converter by Volvo in 1976 increased the demand for rhodium.
Elektronen pro Schale
2, 8, 18, 16, 1
Elektronenkonfiguration
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
12,41 g/cm3
Schmelzpunkt
2237,15 K | 1964 °C | 3567,2 °F
Siedepunkt
3968,15 K | 3695 °C | 6683 °F
Schmelzwärme
21,7 kJ/mol
Verdampfungswärme
495 kJ/mol
Spezifische Wärmekapazität
0,243 J/g·K
Häufigkeit in der Erdkruste
7×10-8%
Häufigkeit im Universum
6×10-8%
CAS-Nummer
7440-16-6
PubChem CID-Nummer
23948
Atomeigenschaften
Atomradius
134 pm
Kovalenter Radius
142 pm
Elektronegativität
2,28 (Pauling-Skala)
Ionisierungsenergie
7,4589 eV
Molares Volumen
8,3 cm3/mol
Wärmeleitfähigkeit
1,5 W/cm·K
Oxidationszustände
-1, 1, 2, 3, 4, 5, 6
Anwendung
The element's major use is as one of the catalysts in the three-way catalytic converters in automobiles.
Rhodium is used as an alloying agent for hardening and improving the corrosion resistance of platinum and palladium.
It is also used as a filter in mammography systems because of the characteristic X-rays it produces.
Rhodium is also used for jewelry and for decorations.
Rhodium is used as an alloying agent for hardening and improving the corrosion resistance of platinum and palladium.
It is also used as a filter in mammography systems because of the characteristic X-rays it produces.
Rhodium is also used for jewelry and for decorations.
Rhodium is considered to be non-toxic
Isotope
Stabile Isotope
103RhInstabile Isotope
89Rh, 90Rh, 91Rh, 92Rh, 93Rh, 94Rh, 95Rh, 96Rh, 97Rh, 98Rh, 99Rh, 100Rh, 101Rh, 102Rh, 104Rh, 105Rh, 106Rh, 107Rh, 108Rh, 109Rh, 110Rh, 111Rh, 112Rh, 113Rh, 114Rh, 115Rh, 116Rh, 117Rh, 118Rh, 119Rh, 120Rh, 121Rh, 122Rh