Ruthenium vs Barium

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PropertyRu RutheniumBa Barium
Atomic number4456
SymbolRuBa
NameRutheniumBarium
Categorytransition-metalalkaline-earth-metal
Standard Atomic Weight101.07 u137.327 u
Period56
Group82
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s14d7[Xe]6s2
Oxidation states[-4, -2, 1, 2, 3, 4, 5, 6, 7, 8][1, 2]
Electronegativity (Pauling)2.20.89
Electron affinity1.05 eV0.1447 eV
Density1.210000e+4 kg/m³3620 kg/m³
Melting point2333.85 °C726.85 °C
Boiling point4149.85 °C1896.85 °C
Discovery year18281808