Rhodium
45
Rh
Gruppe
9
Periode
5
Blok
d
Protoner
Elektroner
Neutroner
45
45
58
Generelle Egenskaber
Atomnummer
45
Atommasse
102,9055
Masseantal
103
Kategori
Overgangsmetaller
Farve
Sølv
Radioaktiv
Nej
From the Greek word rhodon, rose
Krystalstruktur
Fladecentreret Kubisk
Historie
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.
Elektroner i hver skal
2, 8, 18, 16, 1
Elektronkonfiguration
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Fysiske Egenskaber
Tilstandsform
Fast stof
Massefylde
12,41 g/cm3
Smeltepunkt
2237,15 K | 1964 °C | 3567,2 °F
Kogepunkt
3968,15 K | 3695 °C | 6683 °F
Smeltevarme
21,7 kJ/mol
Fordampningsvarme
495 kJ/mol
Varmefylde
0,243 J/g·K
Forekomst i jordskorpen
7×10-8%
Forekomst i universet
6×10-8%
CAS-nummer
7440-16-6
PubChem CID-nummer
23948
Atomare egenskaber
Atomradius
134 pm
Kovalent radius
142 pm
Elektronegativitet
2,28 (Paulings skala)
Ioniseringspotentiale
7,4589 eV
Atomvolumen
8,3 cm3/mol
Varmeledningsevne
1,5 W/cm·K
Oxidationstrin
-1, 1, 2, 3, 4, 5, 6
Anvendelser
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
Isotoper
Stabile isotoper
103RhUstabile isotoper
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