Rhodium
45
Rh
Groep
9
Periode
5
Blok
d
Protonen
Elektronen
Neutronen
45
45
58
Algemene Eigenschappen
Atoomnummer
45
Atomair gewicht
102,9055
Massa Getal
103
Categorie
Overgangsmetalen
Kleur
Zilver
Radioactief
Nee
Van het Griekse woord rhodon, roos
Kristalstructuur
Zijvlak-gecentreerde Kubus
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.
Eletronen per schil
2, 8, 18, 16, 1
Electronconfiguratie
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Fysieke Eigenschappen
Fase
Vast
Dichtheid
12,41 g/cm3
Smeltpunt
2237,15 K | 1964 °C | 3567,2 °F
Kookpunt
3968,15 K | 3695 °C | 6683 °F
Fusiewarmte
21,7 kJ/mol
Verdampingswarmte
495 kJ/mol
Specifieke Warmtecapaciteit
0,243 J/g·K
Overvloedig aanwezig in de aardkorst
7×10-8%
Overvloedig aanwezig in het universum
6×10-8%
CAS-nummer
7440-16-6
PubChem CID nummer
23948
Atoomeigenschappen
Atoomstraal
134 pm
Covalentiestraal
142 pm
Electronegativiteit
2,28 (Pauling schaal)
Ionisatiepotentiaal
7,4589 eV
Atoomvolume
8,3 cm3/mol
Thermische geleiding
1,5 W/cm·K
Oxidatietoestanden
-1, 1, 2, 3, 4, 5, 6
Toepassingen
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
Isotopen
Stabiele isotopen
103RhInstabiele isotopen
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