Praseodymium vs Gold

← Back to Periodic Table
PropertyPr PraseodymiumAu Gold
Atomic number5979
SymbolPrAu
NamePraseodymiumGold
Categorylanthanidetransition-metal
Standard Atomic Weight140.90766 u196.966569 u
Period66
GroupN/A11
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f3[Xe]6s14f145d10
Oxidation states[0, 1, 2, 3, 4, 5][-3, -2, -1, 0, 1, 2, 3, 5]
Electronegativity (Pauling)1.132.54
Electron affinity0.962 eV2.3086 eV
Density6770 kg/m³1.928200e+4 kg/m³
Melting point930.85 °C1064.18 °C
Boiling point3519.85 °C2855.85 °C
Discovery year1885N/A