Periodic Table of Elements showing Ruthenium transition elements





Ruthenium

ElementRuthenium
SymbolRu
Atomic Number44
Molar Mass101.07 gmol-1
Electron Configuration[Kr]4d75s1
Normal Statesolid metal
Density @STP12.36 g cm-3
Melting Point2334oC
Boiling Point4150oC
Stable Isotopes96Ru, 98Ru, 99Ru, 100Ru, 101Ru, 102Ru, 104Ru
Atomic Radius134 pm
Ionic Radius77 (3+) pm
Electronegativity (Pauling)2.2
Ionization Energy (1st)711 kJ mol-1
Ionization Energy (2nd)1617 kJ mol-1
Ionization Energy (3rd)2747 kJ mol-1
Molar Heat Capacity24.1 J K-1mol-1
Standard Molar Entropy28.5 J K-1mol-1
Enthalpy of Fusion23.7 kJ mol-1
Enthalpy of Vapourization567.8 kJ mol-1
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