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Ruthenium Element Properties, Transition metals Group, Periodic Table of the Elements

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Ruthenium

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Ruthenium Element Properties

d43
Tc
Technetium
d44
Ru
Ruthenium
d45
Rh
Rhodium
General
NameRuthenium
SymbolRu
Number44
Group Number8
GroupTransition metals
Blockd
Density12.2 g/cm3
Atomic Weight101.07 g/mol
Atomic Volume8.3 cm3/mol
Discover1844


States
StateSolid
Melting Point2607 K
Boiling Point4423 K
Triple PointNil
Critical PointNil
Heat of Fusion38.59 kJ/mol
Heat of Vaporization591.6 kJ/mol


Energies
First Ionization Energy711.1 kJ/mole
Second Ionization Energy1617.1 kJ/mole
Third Ionization Energy2746.9 kJ/mole
Electronegativity2.2
Electron Affinity101 kJ/mole
Specific Heat0.238 J/gK
Heat Atomization643 kJ/mole atoms


Oxidation and Electrons
Shells2,8,18,15,1
Electron Configuration[Kr] 4d7 5s1 4d7 5s1
Minimum Oxidation Number-2
Maximum Oxidation Number8
Minimum Common Oxidation Number0
Maximum Common Oxidation Number4


Appearance and Characteristics
Crystal Structurehexagonal
Characteristicshard
Colorsilvery-white
Usescatalysts
Hardness6.5 mohs
ToxicityNone


Reactions
Reaction with Airnone below 800 deg.C
Reaction with 6M HClNone
Reaction with 15M HNO3None
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes7
HydrideNone
OxideRuO2 RuO4
ChlorideRuCl2 RuCl3


Radius
Atomic Radius134 pm
Ionic Radius (1+ ion)Nil
Ionic Radius (1- ion)Nil
Ionic Radius (2+ ion)Nil
Ionic Radius (2- ion)Nil
Ionic Radius (3+ ion)82 pm


Conductivity
Thermal Conductivity117 J/m-sec-deg
Electrical Conductivity131.579 1/mohm-cm
Polarizability9.6 A3


Abundance
Sourcenickel ores (sulfides)
Relation Abundance Solar System0.270 log
Abundance Earth's Crust-3 log


d43
Tc
Technetium
d44
Ru
Ruthenium
d45
Rh
Rhodium




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