Periodic Table of Elements showing Thulium lanthanide metal elements


Atomic Number69
Molar Mass175 g mol-1
Electron Configuration[Xe]4f136s2
Normal Statesolid metal
Density @STP9.33 g cm-3
Melting Point1545oC
Boiling Point1950oC
Stable Isotopes169Tm
Atomic Radius175 pm
Ionic Radius104 (3+) pm
Electronegativity (Pauling)1.25
Ionization Energy (1st)597 kJ mol-1
Ionization Energy (2nd)1163 kJ mol-1
Ionization Energy (3rd)2285 kJ mol-1
Molar Heat Capacity27 J K-1mol-1
Standard Molar Entropy74 J K-1mol-1
Enthalpy of Fusion18.4 kJ mol-1
Enthalpy of Vapourization247 kJ mol-1
[Back to Periodic table]

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