Ruthenium vs Lead

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PropertyRu RutheniumPb Lead
Atomic number4482
SymbolRuPb
NameRutheniumLead
Categorytransition-metalpost-transition-metal
Standard Atomic Weight101.07 u207.2 u
Period56
Group814
Blocksp
Phase at STPsolidsolid
Electron configuration[Kr]5s14d7[Xe]6s24f145d106p2
Oxidation states[-4, -2, 1, 2, 3, 4, 5, 6, 7, 8][-4, -2, -1, 0, 1, 2, 3, 4]
Electronegativity (Pauling)2.22.33
Electron affinity1.05 eV0.364 eV
Density1.210000e+4 kg/m³1.134200e+4 kg/m³
Melting point2333.85 °C327.46 °C
Boiling point4149.85 °C1748.85 °C
Discovery year18282021