Arsenic

Properties of arsenic atoms

Ionisation Energies and electron affinity

The electron affinity of arsenic is 78  kJ mol^-1. The ionisation energies of arsenic 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 arsenic in its compounds is not necessarily the same.

• Ground state electron configuration:  [Ar].3d¹⁰.4s².4p³
• Shell structure:  2.8.18.5
• Term symbol:   ⁴S_3/2

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

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