Iodine vs Osmium

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PropertyI IodineOs Osmium
Atomic number5376
SymbolIOs
NameIodineOsmium
Categoryhalogentransition-metal
Standard Atomic Weight126.90447 u190.23 u
Period56
Group178
Blockps
Phase at STPsolidsolid
Electron configuration[Kr]5s24d105p5[Xe]6s24f145d6
Oxidation states[-1, 1, 2, 3, 4, 5, 6, 7][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)2.662.2
Electron affinity3.059 eV1.1 eV
Density4930 kg/m³2.258720e+4 kg/m³
Melting point113.7 °C3032.85 °C
Boiling point184.4 °C5011.85 °C
Discovery year18111803