Oxygen vs Cobalt

PropertyO OxygenCo Cobalt
Atomic number827
SymbolOCo
NameOxygenCobalt
Categorynonmetaltransition-metal
Standard Atomic Weight15.9994 u58.933194 u
Period24
Group169
Blockps
Phase at STPgassolid
Electron configuration[He]2s22p4[Ar]4s23d7
Oxidation states[-2, -1, 0, 1, 2][-3, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)3.441.88
Electron affinity1.4611 eV0.661 eV
Density1.429 kg/m³8860 kg/m³
Melting point-218.79 °C1494.85 °C
Boiling point-182.95 °C2926.85 °C
Discovery year17711735