PERIODIC ELEMENT
Ru (Ruthenium)





Atomic number : 44
Atomic mass : 101.1 g.mol-1
Electronegativity according to Pauling : 2.2
Density : 12.2 g.cm-3 at 20 °C
Melting point : 2250 °C
Boiling point : 4150 °C
Vanderwaals radius : 0.135 nm
Isotopes : 11
Electronic shell : [Kr] 4d75s1
Energy of first ionisation : 722.4 kJ.mol-1
Energy of second ionisation : 1620 kJ.mol-1
Energy of third ionisation : 2747 kJ.mol-1
Standard Potential : - 0.45 V
Discovered by : Karl Klaus in 1844
 
Atomic Structure Uses (platinum alloys)