Antimony vs Osmium

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PropertySb AntimonyOs Osmium
Atomic number5176
SymbolSbOs
NameAntimonyOsmium
Categorymetalloidtransition-metal
Standard Atomic Weight121.76 u190.23 u
Period56
Group158
Blockps
Phase at STPsolidsolid
Electron configuration[Kr]5s24d105p3[Xe]6s24f145d6
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)2.052.2
Electron affinity1.07 eV1.1 eV
Density6685 kg/m³2.258720e+4 kg/m³
Melting point630.63 °C3032.85 °C
Boiling point1586.85 °C5011.85 °C
Discovery year17071803