Thallium vs Copernicium

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PropertyTl ThalliumCn Copernicium
Atomic number81112
SymbolTlCn
NameThalliumCopernicium
Categorypost-transition-metaltransition-metal
Standard Atomic Weight204.3835 u285 u
Period67
Group1312
Blockps
Phase at STPsolidgas
Electron configuration[Xe]6s24f145d106p1[Rn] 7s2 5f14 6d10(predicted)
Oxidation states[-5, -2, -1, 1, 2, 3][2, 4]
Electronegativity (Pauling)1.62N/A
Electron affinity0.377 eV-0.8 eV
Density1.180000e+4 kg/m³1.400000e+4 kg/m³
Melting point303.85 °C-273.15 °C
Boiling point1472.85 °C-165.15 °C
Discovery year18611996