Thulium

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.

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.

• Ground state electron configuration:  [Xe].4f¹³.6s²
• Shell structure:  2.8.18.31.8.2
• Term symbol:   ²F_7/2

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

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