Fermium vs Seaborgium

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PropertyFm FermiumSg Seaborgium
Atomic number100106
SymbolFmSg
NameFermiumSeaborgium
Categoryactinidetransition-metal
Standard Atomic Weight257 u271 u
Period77
GroupN/A6
Blockss
Phase at STPsolidN/A
Electron configuration[Rn] 5f12 7s2[Rn]7s25f146d4
Oxidation states[2, 3][3, 4, 5, 6]
Electronegativity (Pauling)1.3N/A
Electron affinity0.339 eV0.85 eV
Density9700 kg/m³3.500000e+4 kg/m³
Melting point1526.85 °C-273.15 °C
Boiling point-273.15 °C-273.15 °C
Discovery year19521974