Samarium vs Platinum

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PropertySm SamariumPt Platinum
Atomic number6278
SymbolSmPt
NameSamariumPlatinum
Categorylanthanidetransition-metal
Standard Atomic Weight150.36 u195.084 u
Period66
GroupN/A10
Blockss
Phase at STPsolidsolid
Electron configuration[Xe]6s24f6[Xe]6s14f145d9
Oxidation states[0, 1, 2, 3][-3, -2, -1, 0, 1, 2, 3, 4, 5, 6]
Electronegativity (Pauling)1.172.28
Electron affinity0.156 eV2.1228 eV
Density7520 kg/m³2.146000e+4 kg/m³
Melting point1073.85 °C1768.4 °C
Boiling point1793.85 °C3824.85 °C
Discovery year18781735