Rhodium vs Astatine

PropertyRh RhodiumAt Astatine
Atomic number4585
SymbolRhAt
NameRhodiumAstatine
Categorytransition-metalhalogen
Standard Atomic Weight102.9055 u210 u
Period56
Group917
Blocksp
Phase at STPsolidsolid
Electron configuration[Kr]5s14d8[Xe]6s24f145d106p5
Oxidation states[-3, -1, 1, 2, 3, 4, 5, 6, 7][-1, 1, 3, 5, 7]
Electronegativity (Pauling)2.282.2
Electron affinity1.137 eV2.391 eV
Density1.240000e+4 kg/m³7000 kg/m³
Melting point1963.85 °C301.85 °C
Boiling point3694.85 °C-273.15 °C
Discovery year18031940