Rhodium
45
Rh
Groep
9
Periode
5
Blok
d
Protrone
Elektrone
Neutrone
45
45
58
Algemene Eienskappe
Atoom Nommer
45
Atoommassa
102,9055
Massa Nommer
103
Kategorie
Oorgangsmetale
Kleur
Silver
Radioaktief
Nee
From the Greek word rhodon, rose
Kristalstruktuur
Gesiggesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 16, 1
Elektronkonfigurasie
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Fisiese Eienskappe
Fase
Soliede
Digtheid
12,41 g/cm3
Smeltpunt
2237,15 K | 1964 °C | 3567,2 °F
Kookpunt
3968,15 K | 3695 °C | 6683 °F
Heat of Fusion
21,7 kJ/mol
Heat of Vaporization
495 kJ/mol
Spesifieke Hitte Kapasiteit
0,243 J/g·K
Oorvloed in die aardkors
7×10-8%
Oorvloed in die heelal
6×10-8%
CAS Nommer
7440-16-6
PubChem CID Nommer
23948
Atomiese Eienskappe
Atoom radius
134 pm
Kovalente Radius
142 pm
Elektronegatiewiteit
2,28 (Pauling scale)
Ionisasie potensiaal
7,4589 eV
Atoom volume
8,3 cm3/mol
Termiese geleidingsvermoë
1,5 W/cm·K
Oksidasiestate
-1, 1, 2, 3, 4, 5, 6
Toepassings
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
Stabiele Isotope
103RhOnstabiele 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