Родиум

45
Rh
Група
9
Периода
5
блок
d
Protons
Electrons
Neutrons
45
45
58
Општи Својства
Атомски број
45
Атомска тежина
102,9055
Mass Number
103
Category
Преоден метал
Color
Silver
Radioactive
Не
From the Greek word rhodon, rose
Кристална структура
Face Centered Cubic
History
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
Електронска конфигурација
[Kr] 4d8 5s1
Rh
Rhodium metal does not normally form an oxide, even when heated
Физички Својства
Фаза
Solid
Густина
12,41 g/cm3
Точка на топење
2237,15 K | 1964 °C | 3567,2 °F
Точка на вриење
3968,15 K | 3695 °C | 6683 °F
Топлина на топење
21,7 kJ/mol
Топлина на испарување
495 kJ/mol
Specific Heat Capacity
0,243 J/g·K
Abundance in Earth's crust
7×10-8%
Abundance in Universe
6×10-8%
Rhodium
Кредити на слика: Wikimedia Commons (Alchemist-hp)
Rhodium powder
CAS Number
7440-16-6
PubChem CID Number
23948
Атомски Својства
Атомски полупречник
134 pm
Ковалентен полупречник
142 pm
Електронегативност
2,28 (Полингова скала)
Ionization Potential
7,4589 eV
Atomic Volume
8,3 cm3/mol
Thermal Conductivity
1,5 W/cm·K
Oxidation States
-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