Selenium

Properties of selenium atoms

The electron affinity of selenium is 195.0  kJ mol^-1.

Ionisation Energies

This section includes ionisation energies of selenium.

Electronic configuration

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

• Ground state electron configuration:  [Ar].3d¹⁰.4s².4p⁴
• Shell structure:  2.8.18.6
• Term symbol:   ³P₂

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

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