Properties of thulium atoms

Ionisation Energies and electron affinity

The electron affinity of thulium is 50  kJ mol-1. The ionisation energies of thulium are given below.

Ionisation energy number Enthalpy /kJ mol-1
1st 596.7
2nd 1160
3rd 2285
4th 4120

Ionisation energies of Tm

Electronic configuration

The following represents the electronic configuration and its associated term symbol for the ground state neutral gaseous atom. The configuration associated with thulium in its compounds is not necessarily the same.

Pointer to The Orbitron gallery of orbitals.

Kossel shell structure of Tm
A schematic representation of the shell structure of thulium - not what the atom of thulium "looks like".

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thulium atomic number