Oxygen vs Cerium

PropertyO OxygenCe Cerium
Atomic number858
SymbolOCe
NameOxygenCerium
Categorynonmetallanthanide
Standard Atomic Weight15.9994 u140.116 u
Period26
Group16N/A
Blockps
Phase at STPgassolid
Electron configuration[He]2s22p4[Xe]6s24f15d1
Oxidation states[-2, -1, 0, 1, 2][1, 2, 3, 4]
Electronegativity (Pauling)3.441.12
Electron affinity1.4611 eV0.955 eV
Density1.429 kg/m³6770 kg/m³
Melting point-218.79 °C797.85 °C
Boiling point-182.95 °C3423.85 °C
Discovery year17711801