Caesium

Properties of caesium atoms

Ionisation Energies and electron affinity

The electron affinity of caesium is 45.5  kJ mol^-1. The ionisation energies of caesium 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 caesium in its compounds is not necessarily the same.

• Ground state electron configuration:  [Xe].6s¹
• Shell structure:  2.8.18.18.8.1
• Term symbol:   ²S_1/2

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

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