Symbol Ru Atomic radius: pm 133 Fusion: kJ/Mole 38.59
Name Ruthenium Ionic radius: pm (+3)68 Boiling point: C 4150
Atomic number 44 Electron affinity 1.05 Melting point: C 2334
Atomic weight 101.1 1st  ion potential 7.36 Specific Heat Cap: J/(g K) 0.24
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 1.17
Configuration [Kr]4d75s1 Crystal structure Hex Electrical Cond 0.137
Oxidation states 2,3,4,6,8 Density 12.1 Abundance: mg/kg-crust 0.001
Electronegativity 2.20 Vaporization: kJ/Mole 567.8    
Ruthenium was discovered in 1844 by Karl Klaus. Uses - catalysts, platinum alloys