Technetium vs Ruthenium

← Back to Periodic Table
PropertyTc TechnetiumRu Ruthenium
Atomic number4344
SymbolTcRu
NameTechnetiumRuthenium
Categorytransition-metaltransition-metal
Standard Atomic Weight98 u101.07 u
Period55
Group78
Blockss
Phase at STPsolidsolid
Electron configuration[Kr]5s24d5[Kr]5s14d7
Oxidation states[-3, -1, 1, 2, 3, 4, 5, 6, 7][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)1.92.2
Electron affinity0.55 eV1.05 eV
Density1.100000e+4 kg/m³1.210000e+4 kg/m³
Melting point2156.85 °C2333.85 °C
Boiling point4264.85 °C4149.85 °C
Discovery year19371828