Ytterbium vs Lutetium

Side-by-side comparison of Ytterbium (Yb, element 70) and Lutetium (Lu, element 71) by atomic structure and physical properties.

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PropertyYb Ytterbium Lu Lutetium
Atomic number7071
SymbolYbLu
NameYtterbiumLutetium
Categorylanthanidelanthanide
Standard Atomic Weight173.045 u174.9668 u
Period66
GroupN/A3
Blockfd
Phase at STPSolidSolid
Electron configuration[Xe]4f146s2[Xe]4f145d16s2
Oxidation states[0, 1, 2, 3][0, 1, 2, 3]
Electronegativity (Pauling)N/A1.27
Electron affinity-0.02 eV0.2388 eV
Density6900 kg/m³9840 kg/m³
Melting point818.85 °C1662.85 °C
Boiling point1195.85 °C3401.85 °C
Discovery year18781907

Key Differences

PropertyYb YtterbiumLu Lutetium
Standard Atomic Weight173.045 u ↓ lower174.9668 u ↑ higher
Density6900 kg/m³ ↓ lower9840 kg/m³ ↑ higher
Melting point818.85 °C ↓ lower1662.85 °C ↑ higher
Boiling point1195.85 °C ↓ lower3401.85 °C ↑ higher
Electron affinity-0.02 eV ↓ lower0.2388 eV ↑ higher
Blockf d
Electron configuration[Xe]4f146s2 [Xe]4f145d16s2
Discovery year1878 1907