Magnesium vs Osmium

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PropertyMg MagnesiumOs Osmium
Atomic number1276
SymbolMgOs
NameMagnesiumOsmium
Categoryalkaline-earth-metaltransition-metal
Standard Atomic Weight24.3055 u190.23 u
Period36
Group28
Blockss
Phase at STPsolidsolid
Electron configuration[Ne]3s2[Xe]6s24f145d6
Oxidation states[0, 1, 2][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8]
Electronegativity (Pauling)1.312.2
Electron affinity-0.4 eV1.1 eV
Density1740 kg/m³2.258720e+4 kg/m³
Melting point649.85 °C3032.85 °C
Boiling point1089.85 °C5011.85 °C
Discovery year17551803