Ruthenium

rutenio

Ruthenium is named after Ruthenia, an ancient Latin name for Russia. This rare metal is found in the mineral pentlandite, and its pure form is commonly extracted from this ore. Ruthenium dioxide, RuO2, is used in various electronic circuit components, including resistors and microchips for computers and other digital devices. The addition of a small amount of ruthenium makes softer metals, such as platinum and palladium, much more resistant. Therefore, moving parts in devices such as switches benefit from this property.

Resumen de propiedades (Ru)

Atomic weight101.07(2)
Discoverer (year)Klaus, Karl Karlovich (1844)
Natural formmetallic solid (hexagonal)
Electron configuration[Kr] 4d7 5s1
Melting point (ºC)2250
Boiling point (ºC)3900
Abundance in earth's crust (ppm)0.001
Isotope (abundance)96Ru (5.54), 98Ru (1.87), 99Ru (12.76), 100Ru (12.60), 101Ru (17.06), 102Ru (31.55), 104Ru (18.62)
Density g/cm312.37
Van der Waals radius (pm)213
Covalent radius (pm)136
Electronegativity (Pauling)2.2
Vaporization enthalpy (kJ/mol)567.80
Enthalpy of fusion (kJ/mol)38.59
Specific heat capacity (J/g·K) at 25ºC and 1 atm0.24
Thermal conductivity (W/cm·K) at 25ºC and 1 atm1.170
Oxidation state+3
Electron affinity (eV)1.05
1st Ionization potential (eV)7.3605

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