Aluminum vs Ruthenium

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PropertyAl AluminumRu Ruthenium
Atomic number1344
SymbolAlRu
NameAluminumRuthenium
Categorypost-transition-metaltransition-metal
Standard Atomic Weight26.981538 u101.07 u
Period35
Group138
Blockps
Phase at STPsolidsolid
Electron configuration[Ne]3s23p1[Kr]5s14d7
Oxidation states[-2, -1, 0, 1, 2, 3][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)1.612.2
Electron affinity0.4328 eV1.05 eV
Density2700 kg/m³1.210000e+4 kg/m³
Melting point660.287 °C2333.85 °C
Boiling point2518.85 °C4149.85 °C
Discovery year18251828