Cerium vs Praseodymium

Side-by-side comparison of Cerium (Ce, element 58) and Praseodymium (Pr, element 59) by atomic structure and physical properties.

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PropertyCe Cerium Pr Praseodymium
Atomic number5859
SymbolCePr
NameCeriumPraseodymium
Categorylanthanidelanthanide
Standard Atomic Weight140.116 u140.90766 u
Period66
GroupN/AN/A
Blockff
Phase at STPSolidSolid
Electron configuration[Xe]4f15d16s2[Xe]4f36s2
Oxidation states[1, 2, 3, 4][0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)1.121.13
Electron affinity0.60016 eV0.10923 eV
Density6770 kg/m³6770 kg/m³
Melting point797.85 °C930.85 °C
Boiling point3423.85 °C3519.85 °C
Discovery year18031885

Key Differences

PropertyCe CeriumPr Praseodymium
Standard Atomic Weight140.116 u ↓ lower140.90766 u ↑ higher
Melting point797.85 °C ↓ lower930.85 °C ↑ higher
Boiling point3423.85 °C ↓ lower3519.85 °C ↑ higher
Electronegativity (Pauling)1.12 ↓ lower1.13 ↑ higher
Electron affinity0.60016 eV ↑ higher0.10923 eV ↓ lower
Electron configuration[Xe]4f15d16s2 [Xe]4f36s2
Discovery year1803 1885