Ytterbium vs Rutherfordium

PropertyYb YtterbiumRf Rutherfordium
Atomic number70104
SymbolYbRf
NameYtterbiumRutherfordium
Categorylanthanidetransition-metal
Standard Atomic Weight173.054 u263 u
Period67
GroupN/A4
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f14[Rn]7s25f146d2
Oxidation states[0, 1, 2, 3][3, 4]
Electronegativity (Pauling)N/AN/A
Electron affinity-0.02 eV0.65 eV
Density6900 kg/m³2.330000e+4 kg/m³
Melting point818.85 °C2126.85 °C
Boiling point1195.85 °C5526.85 °C
Discovery year18781964