Rodij

45
Rh
Skupina
9
Perioda
5
Blok
d
Protons
Electrons
Neutrons
45
45
58
General Properties
Vrstno število
45
Atomska teža
102,9055
Mass Number
103
Kategorija
Prehodne kovine
Barva
Silver
Radioactive
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.
Electrons per shell
2, 8, 18, 16, 1
Razporeditev elektronov
[Kr] 4d8 5s1
Rh
Rhodium metal does not normally form an oxide, even when heated
Physical Properties
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
Abundance in Earth's crust
7×10-8%
Abundance in Universe
6×10-8%
Rhodium
Zasluge za slike: Wikimedia Commons (Alchemist-hp)
Rhodium powder
CAS Number
7440-16-6
PubChem CID Number
23948
Atomic Properties
Atomski polmer
134 pm
Kovalentni polmer
142 pm
Elektronegativnost
2,28 (Paulingova lestvica)
Ionization Potential
7,4589 eV
Atomic Volume
8,3 cm3/mol
Toplotna prevodnost
1,5 W/cm·K
Oksidacijska stanja
-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 considered to be non-toxic
Isotopes
Stable Isotopes
103Rh
Unstable 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