Ytterbium vs Osmium

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PropertyYb YtterbiumOs Osmium
Atomic number7076
SymbolYbOs
NameYtterbiumOsmium
Categorylanthanidetransition-metal
Standard Atomic Weight173.054 u190.23 u
Period66
GroupN/A8
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f14[Xe]6s24f145d6
Oxidation states[0, 1, 2, 3][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)N/A2.2
Electron affinity-0.02 eV1.1 eV
Density6900 kg/m³2.258720e+4 kg/m³
Melting point818.85 °C3032.85 °C
Boiling point1195.85 °C5011.85 °C
Discovery year18781803