Boron vs Ruthenium

← Back to Periodic Table
PropertyB BoronRu Ruthenium
Atomic number544
SymbolBRu
NameBoronRuthenium
Categorymetalloidtransition-metal
Standard Atomic Weight10.8135 u101.07 u
Period25
Group138
Blockps
Phase at STPsolidsolid
Electron configuration[He]2s22p1[Kr]5s14d7
Oxidation states[-5, -1, 0, 1, 2, 3][-4, -2, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)2.042.2
Electron affinity0.27972 eV1.05 eV
Density2370 kg/m³1.210000e+4 kg/m³
Melting point2074.85 °C2333.85 °C
Boiling point3999.85 °C4149.85 °C
Discovery year18081828