Gadolinium vs Ytterbium

PropertyGd GadoliniumYb Ytterbium
Atomic number6470
SymbolGdYb
NameGadoliniumYtterbium
Categorylanthanidelanthanide
Standard Atomic Weight157.25 u173.054 u
Period66
GroupN/AN/A
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f75d1[Xe]6s24f14
Oxidation states[0, 1, 2, 3][0, 1, 2, 3]
Electronegativity (Pauling)1.2N/A
Electron affinity0.132 eV-0.02 eV
Density7900 kg/m³6900 kg/m³
Melting point1312.85 °C818.85 °C
Boiling point3272.85 °C1195.85 °C
Discovery year18861878