Mercury vs Astatine

PropertyHg MercuryAt Astatine
Atomic number8085
SymbolHgAt
NameMercuryAstatine
Categorytransition-metalhalogen
Standard Atomic Weight200.592 u210 u
Period66
Group1217
Blocksp
Phase at STPliquidsolid
Electron configuration[Xe]6s24f145d10[Xe]6s24f145d106p5
Oxidation states[-2, 1, 2][-1, 1, 3, 5, 7]
Electronegativity (Pauling)22.2
Electron affinity-0.5 eV2.391 eV
Density1.353360e+4 kg/m³7000 kg/m³
Melting point-38.83 °C301.85 °C
Boiling point356.73 °C-273.15 °C
Discovery yearN/A1940