Europium vs Ytterbium

PropertyEu EuropiumYb Ytterbium
Atomic number6370
SymbolEuYb
NameEuropiumYtterbium
Categorylanthanidelanthanide
Standard Atomic Weight151.964 u173.054 u
Period66
GroupN/AN/A
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f7[Xe]6s24f14
Oxidation states[0, 2, 3][0, 1, 2, 3]
Electronegativity (Pauling)N/AN/A
Electron affinity0.116 eV-0.02 eV
Density5240 kg/m³6900 kg/m³
Melting point821.85 °C818.85 °C
Boiling point1528.85 °C1195.85 °C
Discovery year18961878