Rodij
45
Rh
Skupina
9
Perioda
5
Blok
d
Protoni
Elektroni
Nevtroni
45
45
58
Splošne lastnosti
Vrstno število
45
Atomska teža
102,9055
Masno število
103
Kategorija
Prehodne kovine
Barva
Srebrna
Radioaktivno
Ne
From the Greek word rhodon, rose
Kristalna struktura
Ploskovno centrirana kubična
Zgodovina
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.
Elektroni po lupinah
2, 8, 18, 16, 1
Razporeditev elektronov
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Fizikalne lastnosti
Faza snovi
Trdnina
Gostota
12,41 g/cm3
Tališče
2237,15 K | 1964 °C | 3567,2 °F
Vrelišče
3968,15 K | 3695 °C | 6683 °F
Talilna toplota
21,7 kJ/mol
Izparilna toplota
495 kJ/mol
Toplotna kapaciteta
0,243 J/g·K
Zastopanost v Zemljini skorji
7×10-8%
Zastopanost v vesolju
6×10-8%
CAS številka
7440-16-6
PubChem CID številka
23948
Atomske lastnosti
Atomski polmer
134 pm
Kovalentni polmer
142 pm
Elektronegativnost
2,28 (Paulingova lestvica)
Ionizacijski potencial
7,4589 eV
Atomski volumen
8,3 cm3/mol
Toplotna prevodnost
1,5 W/cm·K
Oksidacijska stanja
-1, 1, 2, 3, 4, 5, 6
Uporabe
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
Izotopi
Stabilni izotopi
103RhNestabilni izotopi
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