Periodic Table of Elements showing Thallium metal elements


Atomic Number81
Molar Mass204.37 gmol-1
Electron Configuration[Xe]4f145d106s26p1
Normal Statesolid metal
Density @STP11.87 g cm-3
Melting Point304oC
Boiling Point1473oC
Stable Isotopes201Tl, 203Tl
Atomic Radius171 pm
Ionic Radius88 (3+) pm
Electronegativity (Pauling)2.04
Ionization Energy (1st)589 kJ mol-1
Ionization Energy (2nd)1971 kJ mol-1
Ionization Energy (3rd)2878 kJ mol-1
Molar Heat Capacity26.3 J K-1mol-1
Standard Molar Entropy64.2 J K-1mol-1
Enthalpy of Fusion4.31 kJ mol-1
Enthalpy of Vapourization162.1 kJ mol-1
[Back to Periodic table]

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