Ytterbium vs Dubnium

PropertyYb YtterbiumDb Dubnium
Atomic number70105
SymbolYbDb
NameYtterbiumDubnium
Categorylanthanidetransition-metal
Standard Atomic Weight173.054 u268 u
Period67
GroupN/A5
Blockss
Phase at STPsolidN/A
Electron configuration[Xe]6s24f14[Rn]7s25f146d3
Oxidation states[0, 1, 2, 3][3, 4, 5]
Electronegativity (Pauling)N/AN/A
Electron affinity-0.02 eV0.56 eV
Density6900 kg/m³2.930000e+4 kg/m³
Melting point818.85 °C-273.15 °C
Boiling point1195.85 °C-273.15 °C
Discovery year18781967