Phosphorus vs Osmium

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PropertyP PhosphorusOs Osmium
Atomic number1576
SymbolPOs
NamePhosphorusOsmium
Categorynonmetaltransition-metal
Standard Atomic Weight30.973762 u190.23 u
Period36
Group158
Blockps
Phase at STPsolidsolid
Electron configuration[Ne]3s23p3[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)2.192.2
Electron affinity0.7466 eV1.1 eV
Density1820 kg/m³2.258720e+4 kg/m³
Melting point44.15 °C3032.85 °C
Boiling point280.5 °C5011.85 °C
Discovery year16691803