Carbon vs Thallium

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PropertyC CarbonTl Thallium
Atomic number681
SymbolCTl
NameCarbonThallium
Categorynonmetalpost-transition-metal
Standard Atomic Weight12.0106 u204.3835 u
Period26
Group1413
Blockpp
Phase at STPsolidsolid
Electron configuration[He]2s22p2[Xe]6s24f145d106p1
Oxidation states[-4, -3, -2, -1, 0, 1, 2, 3, 4][-5, -2, -1, 1, 2, 3]
Electronegativity (Pauling)2.551.62
Electron affinity1.2621 eV0.377 eV
Density2267 kg/m³1.180000e+4 kg/m³
Melting point3549.85 °C303.85 °C
Boiling point3824.85 °C1472.85 °C
Discovery year17971861