Samarium vs Lead

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PropertySm SamariumPb Lead
Atomic number6282
SymbolSmPb
NameSamariumLead
Categorylanthanidepost-transition-metal
Standard Atomic Weight150.36 u207.2 u
Period66
GroupN/A14
Blocksp
Phase at STPsolidsolid
Electron configuration[Xe]6s24f6[Xe]6s24f145d106p2
Oxidation states[0, 1, 2, 3][-4, -2, -1, 0, 1, 2, 3, 4]
Electronegativity (Pauling)1.172.33
Electron affinity0.156 eV0.364 eV
Density7520 kg/m³1.134200e+4 kg/m³
Melting point1073.85 °C327.46 °C
Boiling point1793.85 °C1748.85 °C
Discovery year18782021