Samarium vs Bismuth

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PropertySm SamariumBi Bismuth
Atomic number6283
SymbolSmBi
NameSamariumBismuth
Categorylanthanidepost-transition-metal
Standard Atomic Weight150.36 u208.9804 u
Period66
GroupN/A15
Blocksp
Phase at STPsolidsolid
Electron configuration[Xe]6s24f6[Xe]6s24f145d106p3
Oxidation states[0, 1, 2, 3][-3, -2, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)1.172.02
Electron affinity0.156 eV0.942 eV
Density7520 kg/m³9807 kg/m³
Melting point1073.85 °C271.4 °C
Boiling point1793.85 °C1563.85 °C
Discovery year18781753