Berkelium vs Seaborgium

← Back to Periodic Table
PropertyBk BerkeliumSg Seaborgium
Atomic number97106
SymbolBkSg
NameBerkeliumSeaborgium
Categoryactinidetransition-metal
Standard Atomic Weight247 u271 u
Period77
GroupN/A6
Blockss
Phase at STPsolidN/A
Electron configuration[Rn]7s25f9[Rn]7s25f146d4
Oxidation states[2, 3, 4, 5][3, 4, 5, 6]
Electronegativity (Pauling)1.3N/A
Electron affinity-0.5 eV0.85 eV
Density1.400000e+4 kg/m³3.500000e+4 kg/m³
Melting point1049.85 °C-273.15 °C
Boiling point-273.15 °C-273.15 °C
Discovery year19491974