Praseodymium vs Bismuth

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PropertyPr PraseodymiumBi Bismuth
Atomic number5983
SymbolPrBi
NamePraseodymiumBismuth
Categorylanthanidepost-transition-metal
Standard Atomic Weight140.90766 u208.9804 u
Period66
GroupN/A15
Blocksp
Phase at STPsolidsolid
Electron configuration[Xe]6s24f3[Xe]6s24f145d106p3
Oxidation states[0, 1, 2, 3, 4, 5][-3, -2, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)1.132.02
Electron affinity0.962 eV0.942 eV
Density6770 kg/m³9807 kg/m³
Melting point930.85 °C271.4 °C
Boiling point3519.85 °C1563.85 °C
Discovery year18851753