Praseodymium vs Neodymium

Side-by-side comparison of Praseodymium (Pr, element 59) and Neodymium (Nd, element 60) by atomic structure and physical properties.

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PropertyPr Praseodymium Nd Neodymium
Atomic number5960
SymbolPrNd
NamePraseodymiumNeodymium
Categorylanthanidelanthanide
Standard Atomic Weight140.90766 u144.242 u
Period66
GroupN/AN/A
Blockff
Phase at STPSolidSolid
Electron configuration[Xe]4f36s2[Xe]4f46s2
Oxidation states[0, 1, 2, 3, 4, 5][0, 2, 3, 4]
Electronegativity (Pauling)1.131.14
Electron affinity0.10923 eV0.09749 eV
Density6770 kg/m³7010 kg/m³
Melting point930.85 °C1020.85 °C
Boiling point3519.85 °C3073.85 °C
Discovery year18851841

Key Differences

PropertyPr PraseodymiumNd Neodymium
Standard Atomic Weight140.90766 u ↓ lower144.242 u ↑ higher
Density6770 kg/m³ ↓ lower7010 kg/m³ ↑ higher
Melting point930.85 °C ↓ lower1020.85 °C ↑ higher
Boiling point3519.85 °C ↑ higher3073.85 °C ↓ lower
Electronegativity (Pauling)1.13 ↓ lower1.14 ↑ higher
Electron affinity0.10923 eV ↑ higher0.09749 eV ↓ lower
Electron configuration[Xe]4f36s2 [Xe]4f46s2
Discovery year1885 1841