Astatine vs Seaborgium

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PropertyAt AstatineSg Seaborgium
Atomic number85106
SymbolAtSg
NameAstatineSeaborgium
Categoryhalogentransition-metal
Standard Atomic Weight210 u271 u
Period67
Group176
Blockps
Phase at STPsolidN/A
Electron configuration[Xe]6s24f145d106p5[Rn]7s25f146d4
Oxidation states[-1, 1, 3, 5, 7][3, 4, 5, 6]
Electronegativity (Pauling)2.2N/A
Electron affinity2.391 eV0.85 eV
Density7000 kg/m³3.500000e+4 kg/m³
Melting point301.85 °C-273.15 °C
Boiling point-273.15 °C-273.15 °C
Discovery year19401974