Oxygen vs Scandium

PropertyO OxygenSc Scandium
Atomic number821
SymbolOSc
NameOxygenScandium
Categorynonmetaltransition-metal
Standard Atomic Weight15.9994 u44.955908 u
Period24
Group163
Blockps
Phase at STPgassolid
Electron configuration[He]2s22p4[Ar]4s23d1
Oxidation states[-2, -1, 0, 1, 2][0, 1, 2, 3]
Electronegativity (Pauling)3.441.36
Electron affinity1.4611 eV0.188 eV
Density1.429 kg/m³2990 kg/m³
Melting point-218.79 °C1540.85 °C
Boiling point-182.95 °C2835.85 °C
Discovery year17711879