Rhodium
45
Rh
Gruppe
9
Periode
5
Blokk
d
Protons
Electrons
Neutrons
45
45
58
Generelle eigenskapar
Atomnummer
45
Atommasse
102,9055
Mass Number
103
Kategori
Transisjonsmetall
Farge
Silver
Radioactive
Nei
From the Greek word rhodon, rose
Krystallstruktur
Face Centered Cubic
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.
Elektron per energinivå
2, 8, 18, 16, 1
Elektronkonfigurasjon
[Kr] 4d8 5s1
Rhodium metal does not normally form an oxide, even when heated
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
12,41 g/cm3
Smeltepunkt
2237,15 K | 1964 °C | 3567,2 °F
Kokepunkt
3968,15 K | 3695 °C | 6683 °F
Smeltevarme
21,7 kJ/mol
Fordampingsvarme
495 kJ/mol
Spesifikk varmekapasitet
0,243 J/g·K
Abundance in Earth's crust
7×10-8%
Abundance in Universe
6×10-8%
CAS Number
7440-16-6
PubChem CID Number
23948
Atom eigenskapar
Atomradius
134 pm
Kovalent radius
142 pm
Elektronegativitet
2,28 (Paulings skala)
Ioniseringspotensial
7,4589 eV
Molart volum
8,3 cm3/mol
Termisk konduktivitet
1,5 W/cm·K
Oksidasjonstrinn
-1, 1, 2, 3, 4, 5, 6
Applications
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
Isotopes
Stable Isotopes
103RhUnstable Isotopes
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