Platinum vs Thallium

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PropertyPt PlatinumTl Thallium
Atomic number7881
SymbolPtTl
NamePlatinumThallium
Categorytransition-metalpost-transition-metal
Standard Atomic Weight195.084 u204.3835 u
Period66
Group1013
Blocksp
Phase at STPsolidsolid
Electron configuration[Xe]6s14f145d9[Xe]6s24f145d106p1
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5, 6][-5, -2, -1, 1, 2, 3]
Electronegativity (Pauling)2.281.62
Electron affinity2.1228 eV0.377 eV
Density2.146000e+4 kg/m³1.180000e+4 kg/m³
Melting point1768.4 °C303.85 °C
Boiling point3824.85 °C1472.85 °C
Discovery year17351861