Rodio
45
Rh
Grupo
9
Perio
5
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
45
45
58
Ĝeneralaj Propraĵoj
Atoma Nombro
45
Atommaso
102,9055
Amasa Nombro
103
Kategorio
Transirmetaloj
Koloro
Arĝento
Radioaktiva
Ne
From the Greek word rhodon, rose
Kristala Strukturo
Vizaĝo Centrita Kubo
Historio
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.
Elektronoj per ŝelo
2, 8, 18, 16, 1
Elektrona Agordo
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Fizikaj Propraĵoj
Fazo
Solido
Denso
12,41 g/cm3
Fandpunkto
2237,15 K | 1964 °C | 3567,2 °F
Bolpunkto
3968,15 K | 3695 °C | 6683 °F
Varmo de Fuzio
21,7 kJ/mol
Varmo de Vaporiĝo
495 kJ/mol
Specifa Varmo Kapacito
0,243 J/g·K
Krusta Abundo
7×10-8%
Universa Abundo
6×10-8%
CAS Nombro
7440-16-6
PubChem Kunmetita Identiga Nombro
23948
Atomaj Propraĵoj
Atoma Radiuso
134 pm
Kovalenta Radiuso
142 pm
Elektronegativeco
2,28 (Pauling-skalo)
Potencialo de jonigo
7,4589 eV
Atoma Volumo
8,3 cm3/mol
Termika Kondukto
1,5 W/cm·K
Oksidaj Ŝtatoj
-1, 1, 2, 3, 4, 5, 6
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
103RhMalstabilaj Isotopoj
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