Thallium vs Roentgenium

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PropertyTl ThalliumRg Roentgenium
Atomic number81111
SymbolTlRg
NameThalliumRoentgenium
Categorypost-transition-metaltransition-metal
Standard Atomic Weight204.3835 u281 u
Period67
Group1311
Blockps
Phase at STPsolidN/A
Electron configuration[Xe]6s24f145d106p1[Rn] 7s2 5f14 6d9(predicted)
Oxidation states[-5, -2, -1, 1, 2, 3][-1, 1, 3, 5]
Electronegativity (Pauling)1.62N/A
Electron affinity0.377 eV1.6 eV
Density1.180000e+4 kg/m³2.870000e+4 kg/m³
Melting point303.85 °C-273.15 °C
Boiling point1472.85 °C-273.15 °C
Discovery year18611994